So it's the talent vs practice argument again?
On the one hand, you can argue that there is an innate set of talents, skills, or abilities (that are required to be good at WB) that some people possess and others don't, and that people who have them are going to be better (at WB) than people who don't.
On the other hand, you can argue that the skills and abilities that you need to be good at WB are all ones that can be learnt by anyone (if they don't have them already through playing similar games or performing similar activities), and that like most skills the more you practice them, the better you will be at playing WB.
It's like rationalism vs empiricism all over again, though maybe a little less crucial.
Personally I think its the second. I don't know anyone who is good at WB who hasn't spent a very long time practising. Obviously that doesn't rule out innate talent (perhaps some people need less time practising than others).
Even if there is a factor of innate abilities, that some people possess and others don't, I have trouble believing that it would be a very important one. I think this is the order of importance of factors that affect 'skill' at M&B:
1) Hardware
2) Internet connection
3) Time spent playing (practise)
4) Attitude toward the game (dedication or mind set - whether you think it's worth investing time in learning particular skills)
5) Innate talent/ability (if such a thing even exists, or if it would even be relevant to WB)
Perhaps people who argue for talent/ability want to justify the time they've dedicated to the game (in which case, why feel guilty about that?), and perhaps people who argue for it just being practise based want to justify their own lack of natural talent (but if such a thing exists, there's nothing you can do about it, so why feel bad about lacking it - just spam like crazy!).
Either way, the elitism comes about from the position that there is innate talent involved, because it's hard to feel proud and elitist about investing more time in a game, which is why a lot of native players use the argument against cRPG (because time spent is realised as an obvious factor - in terms of gear and character skills gained).