It's not that people only go for theme park rides, they'll also go for "kino" movies. That's why Tarantino can still do it. His movies are all about completely immersing the audience in the movie's world and making use of tech and techniques that make for an epic viewing experience.
No one wants to go to the theater for a "basic" (maybe intimate?) movie where the cinematography doesn't really matter, the sound and visual effects aren't interesting, there's no grand cinematic vibe, etc. Don't get me wrong, it might be a great movie, but why would I want to see it in theater instead of at home?
People will go to theaters for Spartacus and 2001: A Space Odyssey, not for Life Is Beautiful or The Pianist.
A more modern example: I'm really stoked to watch The Whale, but I will absolutely watch it at home. I don't see any point in going to the theater for it.