"You might have time to do grocery shopping for someone who is sick; they might be able to pitch in money when you need a little financial help or help you with your plumbing when your sink clogs up."

That is why it is crucial to maintain contact with your family and to have some friends, so you have people that you know to help you out with these things. Relying on the kindness of strangers is no way to live. The strangers begin to resent it.

I'm a plumber, and I'm not clearing some stranger's drain for free. What can they do for me that is comparable in terms of the equipment, knowledge, time, and getting covered with their shit? Oh, they can give me some money. Volunteering other people's work sure is easy.