I'm skeptical about a specific number of 10,000 hours claimed to be valid across multitude of skills and domains, but I think the spirit of the rule makes a lot

I'm skeptical about a specific number of 10,000 hours claimed to be valid across multitude of skills and domains, but I think the spirit of the rule makes a lot of sense. I think the value of innate talents compared to training and exercise is highly overstated given that almost all skills (hunting and archery possibly being exceptions) are so new in evolutionary time scale that there could not possibly have been any selection for them and so they must lack any specific support in our hardware. Somehow, nobody doubts the importance of exercise in physical fitness. Not sure why mental fitness should be different.