Earlier quoted context omitted.
No, that's true. They just suggest it.
No, again, this is blank-slateism. People are born with genetic predispositions that influence things such as height, eye color, mathematical ability, and career preference. You would only expect population-proportionate outcomes if genetics played no role. Even if they only play a 10% role, you get vastly different outcomes.
The fact that you reach for "genetics" first and foremost is exactly equivalent to racism.