There is a lot to that in all fairness. The movie star is dead, long live the brand! (Which movie goers will consume with bovine passivity on the basis of name recognition alone.)Call me autistic, but this stem from the real problem, the corporations are the real ones responsible for Hollywood being too brand-focused. They got hit hard by the 2008 recession and need to have the studios shift away from making riskier original films and instead make more safer branded franchise installments people know.
These branded products, I'm loath to call them movies, then become the focus of marketing departments as all brands tend to. When your product costs an average of 150 million dollars to produce then the marketers are going to insist on pandering to ensure that as broad a number of demographics as possible are appealed to so that they can reduce the risk of recouping that cost.
If you watch Grace Randolph's channel on YouTube, she is obsessed with demographics and you can bet that the marketing dept. at Disney are too. To them it's money left on the table if your tracking numbers for women and POC are low. That's when the marketing dept. starts to interfere with the creative process by insisting on racial and gender quotas in the product. The result tend to be bland homogenous movies.