Rich parents means you don’t have to work two jobs or work while studying. Means you have free “consulting” on life decisions from the perspective of the upper class. Means you access to new things like computers, phones, cars, etc.
It’s a huge advantage to come from a successful family. It means you don’t have to spend the majority of your time in survival mode but can instead invest in growth opportunities.
I would say there’s an enormous advantage coming from a rich family but it’s not the only requirement.