True, but its a stretch to think he wasn't referring to top end pve content; seeing as how it is already a known issue that top end pve isn't as challenging as most would like. Also, I am assuming you are implying that lvl 50 pvp is included in his explanation. I would argue that if you are referring to pvp, the majority of the population, not being sages/sorcs, would say that top end pvp content is too hard. That is why you nerf a class in pvp, because other classes are having a difficult time against it.
I can't know for sure, but the way its worded leads me to believe he is referring to specifically end game pve content.