Even without genetics this problem still exists. What about the people with parents who push their kids harder? What about the people born in areas with better

Even without genetics this problem still exists. What about the people with parents who push their kids harder? What about the people born in areas with better education? You could push these questions all the way to debating if you ever had any free will to begin with or if your whole life was the result of your environment. And ultimately does it even matter what the answers to these questions are? If rewarding people for being smarter drives the population to move towards the goal, then why not keep things like that?