> The career of a pro athlete has a maximum lifespan of around fifteen years. You have the opportunity to make a lot of money until around your mid-thirties,

This sounds ageist - I'm around 40 and feel I am at my mental peak, compared to even my mid 20's. This isn't a good analogy at all, the brain doesn't "wear out" like a professional athletes' body does, it just changes its structure. The brain is a remarkable organ.