The scale of human potential is vast. Who's to say that, for a given definition of success, a person who's "very successful" with one lifestyle wouldn't be 10x or 100x more successful in another?
Who’s to say what my full potential could have been if it wasn’t for all the lead paint in my house as a kid?
Are you suggesting we shouldn’t remove lead paint from houses? Yes, we can’t know exactly on an individual level what potential was lost to lead paint, but we know it was some amount. Can we not act if we don’t know the exact loss?
..did you eat it?
Who's to say anything about anyone? We only get one shot at this. There's no perfect way to live a life.