There are a variety of factors. The most obvious is from a financial standpoint these studios/executives DO NOT like to take a risks. "New" ideas, and going in a different direction is both a risk in money and time investment (writing, production, marketing). A funny example is like Spy Kids vs Shark boy and Lava girl. Even though both were total trash Spy Kids got a bunch of sequels because it sold while Shark boy and Lava girl was a total flop. Both were honestly equally garbage and used the same special effects/production for the time.

The next factor is pretty much everything after 2016 is now essentially a demoralization propaganda campaign. Trump derangement syndrome is honestly real and Hollywood has it very, VERY bad. The "messaging" was always there but post 2010's the gloves came completely off. They're making white characters black because in their minds they are fighting the modern day Nazis. In recent blog posts GRRM from Game of Thrones honestly believes fascism is on the rise lmfao. So in short Bra Burning Boomers doing Bra Burning Boomer things, and Hollywood (along with many things) is ran by Bra Burning Boomers regardless of culture/race/gender this is generally a very bad thing.

Finally entertainment has changed mostly away from traditional story telling. You can thank social media platforms for this. Matt Damon and David Chase both had very interesting takes on this new push towards streaming and focus groups steering away from anything even remotely engaging. The Sopranos legit could not be made today. They would never let a group of what the social media mob deems evil white men running around saying/doing the things they do on the show lol. Even if its criticizing them for doing it.