an ode to nice guys

Found this on a a rainy sunday afternoon.

And this is so true. (Sniff.)
I don't get it. We might be socially dumb but at least on the overall, have a fairly above-average level of intelligence. Why can't we see that being 'nice' just isn't working?
We listen, we escort, we drop and pick up, we buy thoughtful gifts and do the life-saving, career-boosting work / idea / solutions... and still go home in the end. Hasn't it occurred to us by now that there really isn't any point in doing this? Sure, I'll get appreciated, remembered, kiss my ass. There's no RoI. Even the odds of anything happening by chance are way way too low.
Why do we persist in this self-destructive behaviour? Does niceness come with a side order of masochism? Or just a special kind of dumb?

Sigh.