Why were the ancient Greeks so prolific? Maybe because of the temperate climate in the Mediterranean is optimal for human thriving?
Also, why I was so productive in Vietnam, and also Phnom Penh Cambodia.
Also to some extent, why I am happier in southern California with the sun.
Certainly living in the right climate doesn’t guarantee happiness, but it certainly doesn’t hurt.
If you live somewhere and you’re miserable, and hate the climate, just move and experiment somewhere else.