It's like a baseball game. Most people are benched their whole lives. They never get a chance at the plate. More privileged people with a lucky combination of the right family, the right education, the right timing, and the right opportunity get an at-bat, and they'll either strike out, or hit the ball. A few very lucky people will get to stand at the plate maybe once or twice more.

The wealthy get infinite at-bats. They get to stand at the plate for however long they want, and swing and swing until they get their home run. I worked with a founder like this. He would always talk about his business's humble beginnings, starting from a garage and so on--you know the story. What he would neglect to admit was this was like his 7th try. Every time he failed, he'd just chill on his family's couch, dreaming up his next startup idea.

I think it was Outliers (Malcolm Gladwell) that talked about a similar concept as well. Ignoring the 10k hour thing, it also talks abut small compounding advantages that later add up to more opportunity (for those that take it).

To go with the sports analogy, (paraphrasing, been awhile since I read it) it mentions how birth date coinciding with the youth sport season was a strong determiner of success at that sport because being ~11 months older in the same age group meant they were bigger faster more experienced and would be played more, compounding increases in skill.

There was also a similar concept floating around about darts, where the poor get maybe one dart to throw, middle class a few and wealthier get many. But I can't remember where I saw or read that