I guarantee that anyone who puts in their proverbial 10,000 hours will be able to play the violin. For certain values of "play", of course. As with beating the world record holder of any sports discipline, the real top performers have a combination of the right genes, and the dedication to perform at the highest level. And while you probably won't be able to beat the world record, given enough practice/exercise, any able bodied person can become a decent jumper.