That's an example of seen versus unseen bias. The drain was directly in front of you, and you talked to the person who owned it, so it's easy to understand tha

That's an example of seen versus unseen bias. The drain was directly in front of you, and you talked to the person who owned it, so it's easy to understand that someone benefits from it. If you do a job that indirectly makes things 1% better for ten million people, it's hard to have an example you can look at. You may be improving the world more, yet feel like you're improving it less, because humans don't really understand indirect effects except intellectually, and that isn't very satisfying.