vulcthe only time genetics is really a factor is if like someone is born without proper control over their muscles or some other low percentage thing.
This happens a lot more than you think. It's why some people are naturally more dextrous (sometimes significantly more) than others. The argument is whether or not anybody could reach maximum dexterity despite how naturally dextrous they are.
vulcBut for the most part becoming a top player all comes down to attitude and mentality and not genetics. There’s really not much “natural talent” for stuff like tf2
I also feel like genetics is being used as an umbrella term in this discussion, and I would consider someone's attitude/approach towards improving as part of who they are i.e genetics. Somebody willing to improve however could make the efforts to change their attitude.
Also you might aswell believe that natural talent does not exist if you think it can't for tf2. People termed naturally talented at an instrument for example just click with the instrument and learn it very quickly in the same way somebody naturally talented at a game/tf2 just clicks with the game, learns it quickly and applies what he's learnt with less effort than somebody who's no good at video games.