Just in case you forgot the /s tag, that person’s job isn’t to collect the carts scattered across the parking lot, it’s to move the carts from the cart area to inside the store. The right way to handle the lack of cart areas isn’t to make the workers job harder, it’s to complain to the store.
You are right of course, but that’s part of the joke. I think it’s provokes such a viseral response because it’s directly “against” the reader, not many of us can claim to be directly impacted by genocide for example, even though it’s way worse.