Private schools, private sports coaching, tutoring, association with other successful people/ families, a powerful social network, exposure to careers that generate high net worth, experiences with friends that only people with money really have, travel experiences.
Then you likely graduate from college without debt. You get help buying a first home. You get financial education. Probably started a Roth when you were 16 and first had earned income. If you start a business you have access to capital. If the business fails you know you're not going to end up in the street.
Really there are so many ways you get a leg up it's not funny. And it's not just the obvious money they are getting in trust.