Because I trained hard for it and invested my time to develop these skills, whereas you never did. Video games are no different than real life. You can’t ask people to recruit you for an interesting job or a well paid one if you didn’t develop the skills needed to hold such positions. The problem is that you think that everyone is playing video games for fun: there’s more to video games than fun. Like sports, (or any job) one can do an activity for performances, intellectual pursuit, or for the very sake of doing the activity for what it is (without being obsessed or even caring about the fun it might gives you). Do you think that it is fun to train hard? It’s not. Do you think that it’s fun to “rape” a casual player? It’s not either, but it’s a nice challenge trying to score as much as you can. I’ve personally never played video games for fun itself, but for skill and the freedom it gives me. Yes, skill gives freedom, allowing the skilled player to express its creativity and taking new paths an unskilled one wouldn’t be able to even know of their very existence. Moreover, in a skilled game, there exists some intuitive notion of an ideal player, giving a goal to aim at. Skill allows to reach such ideals, and the latter are beautiful. Fun, on the contrary, is ugly.
Now, it is easy to satisfy people who wants to play video games for the above ugliness: just do what quakelive did with a skill quantifier and a restrictive access to servers. What’s the problem here?