COMMENTS:
There seems to be evidence either way. But with experience you do become better at something too. Role models as much as a specific talent can persuade you into a certain field. But over generations, genes can change to accomodate a person's want in a field providing them with greater capability to be good at something they keep zealously plugging away at, but possess limited talent. For instance, taxi drivers' navigational part of their brain gets bigger with time. Same goes for surgeons (via operations). It's interesting to note how blind or deaf people maximise use of their other senses better than somebody who isn't deficient in any of their senses. That is evidence of some form of physiological change that could occur. So moral is never give up or accept your limitations. And we all those.