Yes, happiness is genetic. I agree. So also is the predisposition to murder, rape, steal, be a homosexual, depression and most other traits we have. Since acquired abilities do not become genes, why do we even bother to “correct” the bad traits?
My question to you is “Whatever happened to ‘survival of the fittest’?” I thought that evolution’s goal is to cull out body parts and characteristics which are inferior and harmful to the species.
After eons of trial-and-error and rejection of what is not the “best” we still have murder, rape, lust, greed and paranoia along with happiness. Your evolution-god has failed. How much more time does your evolution-god need before it gets rid of negative genes?