Violence is an event and inherently ephemeral. Poop is a thing and it will sit there until removed giving me much more time to see it.

Maybe that's why?

I'm sure violence _would_ get on me pretty quickly, but I just don't see that much violence in the homeless in my local area.

Btw, it feels pretty disingenuous that your example is this group of perfect angel homeless people sleeping and praying on the corner. That rhetoric pretty much immediately loses anyone who has regular contact and they think "welp this person doesn't know what they are talking about"