My own idea is that the slow build up of most of Asian movies is not compatible with Pepsi & popcorn audiences !
Most of the horror films now produced in the USA only have action, action, action, plus an overdose of SPFX, and not much more. I don't care for movies whose characters are totally uninteresting, and their horrible deaths become rather gags than anything "dramatic".
Of course - as always - there are exceptions to the rule.