maybe because they were good the way they were!
Yeah, I imagine they were quite marvelous to trap the AI

though it has been said a thousand times before: that is what scouts are for.
But what if you can't avoid that system? Scout or not, you'd have to jump your fleet in and gamble on either being able to overpower the defenders or lose it all. It makes you want to build up as much as possible, which gives the enemy time to reinforce those defenses even more and drags games on and on.
That's the only real issue most people have with turtling. It's not that they're against defensive strategies being viable, it's that turtling often makes games last a terribly long time.
dunno... i just don't think defenses are that powerful. Which means they really need no nerfing, as was the case for the pji.
Defenses by themselves no, but then either the old or the new inhibitors aren't very useful if their only defense is static because static defenses are easy enough to deal with for any medium+ sized fleet.
The problem comes in when you have fully developed static defenses *plus* the enemy fleet versus yours. Then it becomes lopsided. 4 hangars by themselves add 8 squadrons to an enemy fleet. 2 repair stations add a lot of longevity to the ships. Gauss platforms shred any of your close range ships. All while you also have the enemy fleet to worry about.
And on top of that, you're not allowed to retreat unless you destroy the inhibitor, which you probably can do but you would have to bring your fleet into the grav well, since just bombers would get shredded by enemy fighters/Gardas and whatever damage they do to the inhibitor would be repaired by the platforms..