That seems to be because you interpreted the term as something bad. The best wow raiders in the world are still 'just' pve players, even when their action for sure is anything but easy. There is simply no reason to defensive about it. I get my wife rarely to play pvp games with me, because she simply is most of the time not in the mood for it. And no extra rewards in the world could convince her otherwise. People are either in the mood for pvp or not, there is nothing else to it. And pvp is not magically more challenging than pve either, with the wrong fellow players it can be become quite dull very fast.