Honestly I’ve never known of a mechanic shop in an urban area that doesn’t do that, homeless encampment or no. If it’s not homeless people then it’s that their lot is too small or there’s too much other traffic also parking nearby. All of which are extremely not the problem of anyone needing to use the crosswalk, which has a minimum size both for safety and accessibility. Since the tire is on the edge of the crosswalk it seems like it would be far enough into it to have to dodge it as you’re walking by. It’s hard to tell from the angle though.
The context does add some nuance to it; I’m not saying the workers or owners should be thrown in jail for it or that the situation doesn’t suck, but the crosswalks aren’t there for businesses to use for parking, even just a little if they really need the space. It’s not somewhere I would expect to be able to park as a regular person without getting a ticket.