I am getting the feeling that some of the Corvette-Supporters wouldn´t even see a Corvette as OP if it had 200,000 hp, because sure, thats a lot of hp, but if your team just focuses properly, calls out targets and you equip your ship only with anti-Corvette modules, it may only kill half of your team! Perfectly balanced!
Corvettes aren´t balanced just because they are not immortal.
I think you are missing the point. We are not saying that corvettes are balanced because "it is possible to kill them", we are saying they are balanced because it is just as easy to kill them as it is for them to kill you; because hey, that's actually true, if not in favor of you killing them with the appropriate response to the threat.
My "support" for the current state of corvettes is based on a few hours of flying them, and many, many hours of crushing them. My experience tells me that corvettes are really easy to kill, and that they are in a good spot because of that. Buffing them would make them overpowered, but nerfing them would make them useless; ergo, balanced.