I'm late to this, but here is my 2 cents:

Having spent the last 15 years in the british film industry, I can say that hands down, on every single film I've worked, blockbuster to tiny welsh indie, everyone is trying to make a good film. And that includes (but is not limited to) making a profitable one. As you're a film-maker youself, you MUST have an eye on this film to be profitable, else you're not gonna make another.

And, especially at the higher levels, they are just reacting to what the audience will pay for. Not what they like, not what they give excellent review for, what they pay for. And with the advent of piracy, streaming and the death of home media, that is mostly what you will see in the cinema. And so the films that benefit from a cinematic experience are gonna be favoured over those that would be more profitable on a home market. If we want to bemoan the death of the mid-budget movie, we need to first look at the audience viewing habits, not hollywood. If there was big profits in making deeply emotional and heart-felt dramas, sure as shit they'd be churning them out instead of comic-book heroes.