Didn't say you couldn't be good at it, anyone can be good at it. Just loses any glory when you are not on a pvp server full of serious contenders. Which is what makes my previous statement true and accurate.
The PvP aspect of a PvP server deals mainly with open world PvP not war zones. I think goof, full resolve, asçendency , lukewarm, adroit, and probably even covenant could compete quite week with those from other PvP servers.
I joined a pve server because I wanted to focus on leveling. Now I an getting into PvP and it is quite fun. People can change how they want to play. And if bio ware would allow server transfers I bet some from these guilds would go to a PvP server.