this is, honestly, one of the nicest feelings in the world there are so many problems out there and when you find one that is very distinctly Not Yours, and you can walk away and let someone else solve it, there's nothing else quite like it
One thing that I've found has changed thanks to parenthood is that it's actually weirdly relaxing to hear someone else's child screaming on a plane now.
We've had a colleague who would come to us, describe a problem, and then solve it while talking. That was nice, and her name became our shorthand for "problems that other people thought we should solve but were solved by the same people while thinking about them".
It's also nice when something that was your problem (or you thought was) suddenly becomes not your problem and you can just delete that section of your to-do list
Sometimes the hard part is recognizing "It's not my problem" and suppressing the impulse to Solve All The Problems. Conquering that impulse is indeed one of the nicest feelings.
Kids crying on a plane. Or a bus. I don't hate them, I feel bad for the parents and so happy it isn't my kid.
It's also an important skill to learn that not all problems you encounter at work are yours. Took me too long.
"Not my circus, not my monkeys". Simply incredible.
Douglas Adams had a very different take: you can't "find" one of these because of your SEP field. If it's Somebody Else's Problem (SEP), you are incapable of noticing it at all.