There's a limited number of people I can get to know within a unit of time. This means there's a limited number of people I can care about. If there's my coworker Dave who has three children, two dogs, depression, and talks to me on lunch break about all of these, and asks me to take over his task, I can do that. If a random guy I've never seen before comes to me and wants something, I'll naturally look for a way to get him to fuck off
