I think the person you are replying to is making the more basic interpretation that such propensities (someone who stays at home watching movies, someone with t

I think the person you are replying to is making the more basic interpretation that such propensities (someone who stays at home watching movies, someone with the motivation to move to another country, etc) are themselves composed of variables outside of one's control-- genes, gene expression, nutrition, etc, etc-- i.e. blind luck