@sun the internet aggressively homogenized mass culture to the point where people have difficulty believing that other people have different experiences. If you're not aware you live and socialize in a filter bubble, your only options are "the world is not like what I think it is" or "that person is lying", the latter being a lot easier to rationalize.
Side note, I suspect it's genre and location dependent. I've started going to theaters a bit again after not going for decades (too loud for my damaged hearing) and have noticed the experience is wildly different depending on if the theater is in a nicer area or not and what genre film. The worst so far? "Evil Dead Rise" at a theater in an upper middle class area. Lotta people talking and taking videos of the movie while it was playing, lotta kids clearly underage and not ready/prepared for the movie and reacting badly because of it.