Ivy League Parents -> Private School -> SAT tutoring -> Ivy League College -> Investment by Ivy League VC -> Acquired by Ivy League Tech Company
vs
Poor parents -> Shitty Public School -> High School Drop Out -> Programmer at Ivy League Tech Company (maybe)
There's a reason most of the big tech companies are from Ivy League graduates.
And you can't ignore how many successful startups only happened because parental financial support. Someone working paycheck to paycheck to pay for college isn't going to have a reading week to hack with. Or can't borrow $40k from their parents. Or live at home for free.
The game is ultimately fair - even a dog could get funded with traction. But there really is a class system in the U.S. and it is probably the biggest bias in the system.