You misunderstand, I'm saying the traits that allow one to succeed (e.g. intelligence) can be inherited and correlate with the accrual of wealth. Though you are absolutely correct that social connections to other wealthy people create new opportunities as well.

Inheritance, assuming the families have on average more than one child in each generation and the split is even, dilutes a family's fortunes over time. It would be correct to point out that the rules of some dynasties take this into account (head vs. branch families) and prevent this.

I'm not disputing that one's starting position is important, I'm just saying it's not an unchangeable fact of life. One of the reasons YC exists is to help people find the opportunity to become wildly successful by making some of the necessary conditions (money, connections) more accessible to those with talent. And that's a wonderful thing.

Even for myself, I used to do grunt work in a factory. Now I work from home at a cushy software job thanks to things I obtained here. Maybe I won't ever make billions, or become the next Elon Musk, but I'm happy enough just to celebrate my own successes and work to improve my own lot in life.