If public transit is normalized (used by the majority of people, particularly those with money and some political power), those people will demand enforcement of "don't piss in the corner" laws. The problem today is mass transit (outside NYC and a few other places) is largely used by working class with neither the means, power, or time to push for change.
It's not bad reasoning, though I just want to point out that NYC has tons of public transit, used by both working class and non-working-class people, and those problems persist.
The DC metro is also used by lots of "elite" types.
The problem is nobody does anything because nobody else cares enough, tbh.
Nobody cares enough to call the police because they know the police won't do anything. The police won't do anything because they'll arrest people and those people will be let out a few days later with no punishment. Why? Ask the elite representatives in DC I guess. They probably just don't care to solve it or don't want to solve it. There was a dude who vandalized a store and stole some stuff in DC, got arrested, let out 2 weeks later and literally 2 days after being released did the same exact thing.
I've unfortunately seen creeps doing awful things in front of innocent people too and its one of those things that nobody will spend time tracking down I guess.