What is heartwarming about this other than this person patting themself on the back for being a decent human being? While it's nice when someone is reasonable

What is heartwarming about this other than this person patting themself on the back for being a decent human being? While it's nice when someone is reasonable and polite but it doesn't magically make up for the other 100 people who acted like I don't have the right to get on the bus.