I agree, nuke turreting is fine. And I'm saying this as someone that's been on both sides of the issue. Counter-nuking and raid counters are good ways to counterplay against turrets, while not being so powerful as to invalidate a playstyle that is vitally important for the long-term health of the game. Without the possibility of turreting, there's no incentive for the winners of wars to stop holding down their rivals. That leaves open the possibility of IQ-style shenanigans, and I shouldn't need to elaborate on why we need to avoid that.