I'm, sorry. I thought the first three films covered that the theme park was a BAD IDEA!!
And now we're adding a mutant dinosaur? How stupid are these geneticists?
I'm in full agreement that this is not necessary to make, and that the mutation angle is bordering on the ridiculous.
Jurassic Park is supposed to serve as a warning not to play god, a fanciful reminder that we can't control nature, no matter how hard we try. Bringing extinct killing machines back from the dead, only for it to spiral out of control, worked fantastically. For two movies (I liked the third too, because the people weren't even supposed to be there. I find that idiocy amusing.).
My biggest problem with the whole premise is the mutant for this specific reason. Make another Jurassic Park? Okay. Have them actually build the attractions that led to the first disaster? All mighty dollar, right? I can see that, and that alone is a suitable explanation. That's cool. All of that sets up a movie with the same message and offers new thrills. That would be fine. Crossing dinosaur DNA to make a super monster? Why? We had intelligent dinosaurs to kill us already. We had big ones that could tear through steel cages with their face. We didn't need some twisted T-Rex/raptor hybrid or whatever to get the point across.
Jurassic Park's main theme is actually about a failure of a capitalist dream because John Hammond was a greedy, vindictive man who was all too eager to remind people that he "spared no expense" while doing things like,
-Cutting corners on staffing. Why were Nedry and Arnold the only two programmers, and why weren't there precautions taken to prevent corporate sabotage? BioSyn, the rival corporation of InGen that paid off Nedry to steal the samples, was well-known for stealing and reverse engineering other genetics corporations' shit to make a profit and they too had been trying to clone dinosaurs; InGen was about ten years ahead of where BioSyn was, which is why they wanted the embryos, Nedry had also made it clear to Hammond that he was not satisfied with his pay and was having financial issues, which they touched on in the movie. While it's possible Nedry would have jumped at the chance for the millions he was promised by Dodson regardless, it's likely he was approached after it was discovered that the head programmer at Jurassic Park was very disgruntled with his position. Keep in mind that what Nedry did was extremely illegal and negligent, and he very likely would have been facing a huge legal battle had he not been killed.
-Not providing sufficient habitats for many of the animals or having redundant security features as a precaution in case power did fail across the park, which given that everything runs on electricity and you're in a place that gets hit with tropical storms quite often, isn't implausible even with back up generators. Even looking at the raptor cage, it was pretty much a box, and there weren't any physical barriers for the animals except for the fences and some moats, both of which proved to be hilariously inadequate once the fences failed.
-Not studying or understanding the animals to actually see if the African bull frog DNA could actually make the animals change gender (a reminder, Dr. Grant was a paleontologist, not a biologist, and he knew that the frogs could do that), if the whole Lysine Contingency was effective (in case you forgot, basically the dinosaurs were engineered with a lysine deficiency that they could only get by their provided food. They would go catatonic and die without it. This was a security precaution). Given that years and years had passed on both Isla Nubar and Isla Sorna and there were dinosaurs left on both sites (in the novels, only Isla Sorna, or Site B, had surviving animals; Isla Nubar was bombed to shit by the Costa Rican military at the end of the first novel), it's clear that the dinosaurs adapted and thrived without it. Other problems they had were some attractions were designed without accounting for the aggression of certain animals, like the aviary with the pteranodons (which I was actually delighted to see was a thing they brought into JP3, because it was a major part of the first novel that didn't make it into the movie), the staff planting poisonous plants in public areas without realizing that they're poisonous (which falls under the "nobody actually took the time to understand what the hell they were dealing with, and instead were more interested in shoving shit out there to make a buck by cutting corners" category), and a bunch of other shit like that.
-Not destroying extremely dangerous animals, despite knowing exactly how obscenely violent and dangerous they are. Hammond was warned repeatedly about the raptors, and given the lengths of containment they had to put them in, would have been impossible to show visitors anyways), and the lawsuit that was coming from the worker being killed by the raptors that Hammond covered up by having his lawyers claim was a construction incident. He kept the raptors anyways, despite knowing their threat and intelligence, because he didn't want to destroy a shitload of money. Other incidents that happened in the park between the staff and the animals also goes on to highlight how they really didn't take the proper precautions to understand them first. One thing I remember was the dilophosaurs feeders didn't know to wear protective masks when going near the cages because nobody bothered to find out that they could spit blinding ass venomous spit accurately from dozens of feet away, amongst other things.
There's a bunch of other stuff, but Jurassic Park's failure wasn't because man underestimated nature, it was because man's a greedy dick who cut corners in the interests of turning a quick profit without taking the time or money to ensure the park was safe and that they understood the creatures they were creating. Hammond didn't really see the dinosaurs as animals, just property that would be an attraction. He basically put all his cards into making the dinosaurs, and didn't take nearly enough time or resources to study them before putting on the green light to get the park opened.
Had Hammond really "spared no expense" like he claimed, Jurassic Park could have absolutely been a viable success. It was his hubris that doomed the park from the get go. The dinosaurs were more of a symptom, rather than the cause, of why the park failed.