True, but unless everything is fired manually, electronic warfare in space would still pose a threat, and this is how it would likely be done, but by then, it would probably be even more refined.
- DDoS the ships systems from all sides at once from unmanned probes.
- While you are busy launching volley after volley, a small jet black drone could be deployed in space to come up from around a side of a nearby planet, it being up near the pole, to launch a few quadrillion waves of microwaves to cook, fry, and otherwise melt everything or everyone inside the facility.
Unless you can see such a thing with your bare eyes before it starts firing, I'm pretty sure the large platform is a dud in this case, HOWEVER stopping ship to ship combat nearby is a thing this would do effectively.
The reason I chose the polar caps is the magnetic fields tend to be strongest there, effectively distorting any scanners. I chose black because that is how space appears to the naked eye.
There is no weapon that is the "best" weapon for anything, unless it is your mind, because that thing called "ingenuity" is the biggest weapon of all.
Also, for each action, an equal and opposite action would need to happen. Since space is "friction-less" shooting a payload in one direction, still requires an equal force to be expended in the opposite direction, meaning the platform is moving, but it seems to be moving back to the planet it was slowly falling to in the first place.. or should I say orbiting? Should it be free floating, then you run other risks, such as asteroids, comets, space debris, etc... and glass would not hold up to all of that , which is why I would suggest using crystals or gems. (Remember transparent aluminum? forge aluminum on a higher gravity planet, I'm sure you will get it once you find out the right forging techniques and/or materials to add.)
Also, construction time would be your enemy, since someone could literally just rocket up a closed up submarine into space and launch torpedoes at you while you are building them. To each their own I guess because it is not like you can hide the fact that something is going on in space when people start seeing a massive shadow forming during the day over the planet.
If it is being made outside of the orbital sphere, that means communication can be messed with or even halted to slow or halt construction.
Also, I'm just attempting to give constructive criticism, nothing more.