How many people with $300k go on to build Amazon? Nobody is saying he didn't have any help, and that's frankly not the bar we want to measure people by.
Statistically, people with wealthy parents are far more likely to be wealthy than those of poor parents. Bezos would have been far less likely to create Amazon did he not get that loan. Do you dispute this?
Maybe. So what? No one is an individual. “He” is also a product of his parents’ DNA mixing to produce an intellectually healthy and superior brain. His parents also stuffed copious amounts of useful information into that brain. As did people around him growing up. And his parents used savings, likely derived from many generations of people passing on their wealth/culture/knowledge, to aid in the continuation of their DNA’s importance to humanity.