When it comes to movies, I think it's because high concept stuff gets focus grouped to the point where it is recognizable for average audiences.

Many movies you can see there is a grain of some great idea for something new or interesting, but you can almost see exactly where studio execs said "no that's too complicated dumb it down for the audience"

And the weird indie auteur stuff is almost universally horror films these days it seems. Which means I personally am super not interested.