Unrelated to your point, but undercutting your conclusion is the fact that the "27 year old rock god" cliche came about in large part due to the # of rock stars

Unrelated to your point, but undercutting your conclusion is the fact that the "27 year old rock god" cliche came about in large part due to the # of rock stars who died at 27. Check out the wiki article on "the 27 club" for more info. Plus, when you're 27, you're probably at or near your physical peak. IE, you're good looking. And that's arguably more important than any skill.