It’s more about the home environment. But all of these things are intertwined, with correlation often being mistaken for causality.
I went to private school and I’ve done okay. Is it because I went to private school? No, it’s not. It’s because both my parents are pretty smart and I grew up in an environment where I was taught the importance of hard work and where dossing just wouldn’t have been tolerated. I was pretty decent at studying but if I didn’t bother, I’d get a proverbial kick in the rear-end. I also had good facilities in terms of there being a Study in the house. And my brother and sisters aspired to have decent jobs or their own businesses, as did my pals, so there was a culture of
I’d attribute almost all of any relative success I’ve enjoyed to the home environment.
The flipside is that it must be very difficult for someone, no matter how smart or wealthy he or she is, if their homelife is messy.