In many cultures multigenerational households are the norm. You may never move out; you raise your kids in the same house your parents raised you.
If you're from a poor family and break out of poverty, you're still in a worse financial state than someone from a rich family, even holding income and assets constant. You've got to effectively self insure (by taking fewer risks; being more conservative in investments; cutting down on rich people expenses that help with networking) to plan for the worst case scenario. And rich kids don't even realize how much their families' financial status enables and drives their behavior.
And that's not even starting to count financial expenses to take care of aging parents who can't afford to take care of themselves.
Like: I built a $50 billion business with my own hands. Okay, I got the first $2 billion from my parents. Okay, I got the first $2 billion for every business from my parents until I was successful.