Is there such a pressure to buy snacks ?
2h without eating doesn’t feel so difficult.
Normally, I'm doing all kinds of things with my hands. Usually, I'm at a computer, I have my phone, I'm playing with my cane, or I'm flicking my fidget cube, etc. But I can't do any of those things at the movies. I need to snack during movies because I'd go nuts if I didn't have something to do with my hands. A bag of popcorn is a godsend... I can keep grabbing pieces of popcorn and sticking them in my mouth, which keeps my hands occupied.
Movie theaters almost universally do not allow outside food or drinks, so that isn't really an option. But these days if I ever go to a movie I pretty much exclusively go to a dine-in theater(alamo drafthouse, studio move grill, etc) because at least there I'm getting decent food instead of a paying $20 for tub of popcorn and soda that cost them probably less than a dollar, not to mention they have comfy recliners instead of those awful padded seats most theaters have.
If going to the cinema was free, I would still choose to wait for movies to be released for in home viewing. The cinema experience is /that/ bad.