Well I'd guess that making sure the odds of survival are as good as possible - is "working" for anyone. Unless suicidal. There can be an in between (like your outlook), but who wouldn't increase their survival ods if given a chance, however you look. Happiness is a higly misunderstood concept, very skewed and many people are running in circles just because of that (many indulge in alco/narco, just because they can't seem to find that "nirvana", "permanent happiness", which simply does not exist). I dont ceased to care about how happy I am quite some time ago, because I know that feeling "happy" is a natural outcome when you have all your ducks in a row in life, pretty much it. I feel at ease most of the time, chill, not much worries, my survival is not threatened too much, thus I'm pretty "happy" (not depressed is good enough).
Happiness or not, you're the same guy who, judging by your posts here and elsewhere, is constantly seeking avoidance of inconvenience and his own enjoyment, pleasure, and satisfaction and in doing so constantly scoffs at other men who are "all dead by 50" and miserable. If happiness is not so important perhaps you shouldn't speak for all the supposedly miserable people on this earth, which seems by you, any middle class guy who chose to raise a family, work a J-O-B, and couldn't manage to have sex with a new eighteen to 25 year old woman every week, or didn't have the ability in the first place.
You and your philosophical shenanigans.