Like going back to the early 90’s there was this incredible rash of bad films, especially action movies, and that was just the nature of Hollywood incentives.
Because I think the complaint in some sense isn’t the fact that there are progressive movies, it’s the fact that it’s a layer added to all low risk big budget studio films.
But these movies would likely be bad for other identifiable reasons if not for the sprinkling of diversity. The lord of the rings on Amazon isn’t otherwise great.
So sometimes I think this criticism is just feeding into the very thing it’s trying to fight. Industry is great, and it’s great for the reasons described, but I think the moral ambiguity problem as described isn’t caused by diversity, they’re correlated. Bad movies have less moral ambiguity and use diversity in a hamfisted way.