It didn't used to be a problem for me, but cell phones didn't exist when I grew up. People suck, but it differs from location to location. I drive to places with more affluent and educated demographics to watch movies.
>I’m just flabbergasted why they would waste their own time with such an odd movie.
Lots of people don't and many theatres are struggling. If I understand your example, your theatre was 99% empty and you were the only non-talker there, haha.