Sigh. People keep missing he most important aspects of the so-called 10,000 hour rule.

It's not 10,000 hours of practice. It's 10,000 hours of a certain type of practice. The practice must be directed, with feedback from coaches. The original paper this came from also mentioned that the experts practiced differently: They often spend a lot of time doing drills and focusing on individual skills. It's a very focused, methodological approach.