Zuckerberg went to a high school, current tuition cost of which is over $57000 a year.
Warren Buffett's father was a congressman, his grandparents owned a retail business. Buffet was sent to an Ivy League school.
Beyond this, Kleiner Perkins did not give Jeff Bezos millions in VC back in 1996 because they liked him. He was around then, but they were too. As well as the employees shipping out books then. As well as the employees shipping books out now. Kleiner Perkins gave money then, anticipating the exploitation of Amazon factory (and non-factory) workers now. The company was not built with Bezos as some Atlas figure. It was built by millions from Kleiner Perkins in 1996, and by the exploited people doing the work there every day.
Bezos was given billions for successfully doing this. It does not waive away the expropriation of surplus labor time of those who work there.