Can you completely discount the part played by one's innate ability, though? I have been able to sing in tune and play percussion instruments (mainly the tabla) from a very young age, though I am no prodigy. Sadly, I was never motivated enough to put in the effort to become better at music and am still an amateur.

I think I'd have had an (initial) advantage over someone who absolutely sucks at music and is learning to sing or play a percussion instrument.

I feel the same thing when I look at people who are much smarter than me when it comes to intelligence.