It's a tradeoff you can make. The US is far from the only country in the world where fare evasion is a problem. I've lived in countries with similarly high inequality and homelessness where fare evasion was such a problem despite enforcement that the bus drivers would simply refuse to pick up certain passengers, and conversely people would then hitch a hike on roller skates behind the bus.
I don't doubt that there are countries worse than the US (in this regard). But that doesn't mean you can't learn from the success stories. Especially since they are really common in a variety of places that don't have much in common otherwise, so it can't be too hard to clamp down on most fare evasion.
> [...] and conversely people would then hitch a hike on roller skates behind the bus.
I assume there's not much overlap between the really problematic passengers (often loud, drunk, aggressive and/or mentally ill) and the skaters? Mostly just because you need a minimum level of physical fitness to pull this feat off, and you need to be organised enough to both have skates and have them at the ready?
In most places I lived in, the traffic police (if nothing else) would nab you for trying to pull this stunt.