This is actually sort of analogous (and me being me, I love a good analogy) to a principle I've strictly adhered to my whole life: don't take out your problems on other people. They don't deserve it, and it never makes your original problems any better.
It's like the money multiplier. Someone or something injects you with negative emotion, and you don't just pass that on like currency to the next person; it still stays with you but then creates needless negativity. Just like there's no tangible good behind the artificially generated currency, the original event never had anything to do with blow that was dealt to the victim of somebody's inability to deal with their problems. Perry told us it's like we created something from nothing. Whether it's pain or money, such a thing shouldn't happen.