There needs to be made an explicit distinction between static traits and malleable ones. There doesn't seem to be any distinction being made and static ones are being confused for malleable ones and vice versa.
A static trait is anything that cannot be changed such as height, pelvis width, leg length, etc. A malleable trait is one that can be changed such as weight, strength, mental processing speed, flexibility, lung capacity, etc.
Now something like musical "talent" is a malleable trait. You are born with the ability to learn music if it's part of the experiences you grow up in. Culture biases you to the kind of music you prefer. E.g. Chinese people prefer Chopin because his music is melodic and Chinese music is also melodic. It also biases you against certain kinds of music. E.g. Classical musicians don't usually like pop or jazz.
When static traits are being compared, everyone will be different. As such, it's not fair to compare them as if they are the same, even if sports do exactly this. This is why all basketball players are tall because 1) the taller a player is, the easier it is to play the game, and 2) it closely equalizes static traits amongst players. The difference, then, between players will be mostly in skill, which is a malleable trait. Some players will be more determined and will make as much effort needed to surpass others. Some players will do it the smart way (personal trainers, coaches, dietary changes, learning related activities [e.g. dance]) while most others will do it the hard way (practicing more, working out more) and some don't do anything to improve their game.
In piano playing, there are certain static traits that will limit a person's ability to play certain repertoire such as reach. Reach can be increased, more especially so if the player is new, but an experienced player will already have stretched it as much as s/he can. If repertoire demands a stretch of a tenth, and the maximum reach is only an octave, then the player must either a) accommodate by rolling it or condensing it to an octave, etc., or b) play something else.
Is the person who chooses to accommodate by rolling it any less talented than a person who can easily make the reach? Well, couldn't we also argue that the person who chooses to make the accommodation more talented than a person who could easily make the reach? After all, it requires more skill and creativity to accommodate a physical limitation, e.g. the no-armed pianist or the no-armed writer.