There are plenty of Americans producing interesting films, but the blockbusters that get the big budgets and the promotion are just going for the biggest possible audience, so they don't take risks.
Imagine big studios saying now they'll stop marvel movies, there d be a riot. I remember when the Inception + Shutter Island miracle happened and was reading Hollywood execs were flabbergasted and trying to formalize it so they could churn copies every few months.
There s nothing to do: they are private entreprises and they fit an addictive hole. Would be like trying to forbid beer because it s not as intellectual as cognac. I just feel like for some reason smaller markets do films differently because they just cant compete: Im French and live in Hong Kong, in both, local big budget blockbusters flop spectacularly because they feel too much like Ersatz (the CGI is years behind, the love story is under developed, the explosions are not well timed, the enemy is not as manichean, whatever), while smarter movies make us all proud "heh americans couldnt shit one like that, we're so special" :D
Other cultures have their thing too. Bollywood has dancing in everything which still doesn't make sense to me after watch a bunch of Bollywood movies. Korea has their K-Dramas. Every one is the same.
I'm only pointing out they are also pandering to their own fan bases and it can be just as formulaic as Hollywood. No need to put things on a pedestal.