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
Darts would be a funny way to make the analogy. It is very much a sport performed by people from the low class, since it is relatively easy to perform and practice in pubs. But you still need to have some money to buy a beer at a pub, ie. it ain't the homeless playing. The most poor people can barely afford their rent, and work off their ass doing so. Single mother with three jobs has near 0% to start a successful business.
There's an old saying: Time is money. Flip that around: Money is time.
If you have money, you have more time, more opportunities to try things in order to find success.
You can read all about how to play an instrument, or how a bike works, but you'll never learn to ride or play without time to practice.
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.