Well bearing in mind that a) hard cases make bad law, and b) this is the interweb, then I think that no, you shouldn't be able to choose between your bad genetic traits and your good ones.
The public expects to see a battle between individuals based on natural (dis)ability, hard work and tactical planning.
If you're born with fantastic legs, then good luck to you. If you're born with crap lungs, pick running as a recreation rather than a career choice.
Hope this helps. Whether it's a "better" answer is a bit subjective....