They do. It would have been more interesting in the Captain Marvel move if the Kree and Skrull both had legitimate claims while also being at fault, instead of just one side being the bad guys, so that Carol could easily pivot to the good side once she bacame aware. And then put Earth in the middle of a morally complex predicament, giving the hero a truly difficult decision to make.

Even Thanos with his environmental message just ending up being treated as another villain to be defeated in Endgame.