>happiness is very subjective, and may infact have a strong genetic component.

I agree that happiness is subjective and personality trait expression may very well have a genetic component, but I wouldn't dismiss societal and environmental factors entirely.

For example, inequality and air pollution are also associated with unhappiness.

https://news.virginia.edu/content/income-inequality-increase... https://www.sciencedaily.com/releases/2013/01/130118125955.h...