See that, I just simplified two different games into obviously false statements on both ends. As any Poker player knows, there is far more to it than just being lucky with the flop, turn, and river, just like any WoW player knows there is more to being successful in arena than just having good RNG and playing a lot. So if WoW is not so easy to be really good at, what skills does it take to be a great arena player about WOW GOLD? Obviously this is a hugely open-ended question, and Azael did write a pretty good article on what it takes to have a successful 3v3 team, I think the most important aspects of being stellar at WoW boil down to 3 main things:

This range across all classes and specs from things like not stunning into IBF and not psychic screaming a closed rogue, to more advanced things such as lichborne immuning a polymorph mid-cast while deep frozen or mirroring rogues vanish to sap them while they are in their own improved stealth to get cheap wow gold.

An easy example of this would be playing as a rogue and having a plan A and plan B for everything such as kidney shots missing or landing, vanishes breaking or working, opponents trinketing blinds or not to get cheap wow gold, etc.

As you can see, I have already briefly established my reasoning for why WoW is not as overly simplistic as some people make it out to be about WOW GOLD, especially considering there is far more to being successful in arena than just the things I have outlined here. Just like there is far more to being successful in Starcraft than just "good micro." In fact, a running joke at WWI Paris 2008 where Blizzard held their Starcraft invitational tournament was that no one besides Asians had the capability of playing Zerg well due to the massive amounts of macro and micro involved.