Because they trust us to not step on them. They see that we try to avoid them, and so, of course we won’t hurt them!

Smart but not quite smart enough to realize accidents happen lol.

They do seem to know if someone is disabled though and tend to either run faster (to clear the person’s path faster) or give a wider birth from what I’ve seen. They have to be near the human for awhile to realize though, that’s a learning curve for them.