Earlier quoted context omitted.
Is human pee any more gross than dog pee? This isn't a rhetorical question - I'm genuinely asking.
Human pee transmits human diseases.
Human feces, on the other hand, is quite dangerous. Generally you have to touch it or ingest it to get sick from it, but there are lots of ways for the bacteria to spread.
So the urine isn't dangerous, but if people are urinating in public, there's a risk that they're also defecating in public. And that's more serious.