https://medium.com/@alexgoulden/what-percent-of-human-historys-7-footers-have-played-in-the-nba-ec4ec60c1801

To be fair, if you live in the US and are 7' or taller, there's a 17% chance you were employed by the NBA at some point.

If you lived anywhere in the world it only drops to 9%

So it's pretty decent odds that any random 7' or taller person has played basketball professionally.