It's odd to me that you're calling people fools for spending money on an experience they want and can afford. It's like people saying paying for games is foolish because they don't like games. It's a mute argument that amounts to "I don't understand so it's dumb".
There are still movies that give you better experience in theater like 3D IMAX, of course one can say you can make have a home theater but I've yet to see anyone has one at home that's anything comparable and the money spent can watch many movies in theater. I have a 3D TV and a very good sound system, but definitely can't compare.
Also, on a day of 105F+ outside, rather than running AC at home, grab a ticket and watch 2 or 3 movies in theater probably save enough electrical bill to cover the ticket.