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
Baseball isn't popular world-wide. The most popular game here is football (that sport which USA calls soccer).
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.
The description sounds like a part 2 or updated approach/angle to Mindset (Carol Dweck), a book that made a changing impact when I first read it, but reading the updated edition years later left me wanting more. I had also read a couple of Adam Grant's earlier books and enjoyed them, will definitely check out Hidden Potential.
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