True, but is your level of success similar to the level of success of someone who is the best in the world at something?
However, I think the question is how likely it is that you would be able to become the best in the world at something?
I think that people who are the best in the world at something tend to be genetic freaks. Are you one? Probably not.
In that case, attempting to become the best in the world might mean setting yourself up for failure, though presumably you would still be more successful than an average person. It's just that there's a massive difference between being in the top 10% and the top 1% in terms of reward.