Just deal with it, if you compare two people that play osu! under the same hardware to avoid FPS difference, cursor lag and such, with the same keyboard and tablet, and both have the exact same playstyle, if one has better reflexes and stamina, their skill cap WILL be higher, cause he can react faster and last longer than the other one. The way I see it is like comparing two different PCs that share the exact same software (being the software the comparison to having the same input devices on players, tablet, keyboard and also PC.), one has better hardware than the other (because of their "talent"), they both have the same software, the one with better hardware will win EVERY test, simple as that.
Achieven high level play CAN be done by practicing, and even if you are talented you need to practice, but the skill cap on every player is different, and talented ones WILL have a higher skill cap, because their body has more potential.
I hope that explained my point of view.