Sixty years ago they made movies for "everyone." Then TV came along and the market shrank. So they began to make movies for that segment that stayed with them.
hollywood produces either rehashed remakes - each one worse than it's predecessor, or trash. they use special effects to make up for lousy scripts, acting, etc.. and think that people won't see through it all.
if they made a movie worth seeing, people would go see it. the market reflects it's contents - sluggish and junky.