Counter anecdata, I rode Bart last night from 16th mission at ~9PM. First I waited 45mins for a train, then all the available seats on that car were covered in piles of trash, and panhandlers hassled the elderly couple next to me.

I think BART is generally tolerable, but you're dismissing how obviously fucking terrible the BART experience can be and regularly is. A lot of people aren't willing to deal with that roulette, nor should they have to. Other transit systems aren't this bad.