Why are warlocks pretending to not be OP?

Obivously most classes won't admit they are OP since that means they have to step off their golden throne.
But I mean it's so blatantly obious that warlocks are OP it's ridiculous.

PvP:
2v2 Dominating
3v3 Dominating
5v5 Well represented

PvE:
Top 3 DPS
Better utility than most DPS classes.

Grinding:
Only hunters could really compete with a warlock in grinding speed.

Can anyone even argue with the above?

I'm sure this thread will be full of "L2P" and the likes, I don't care really. The above is pretty much a fact.

Now why do I care? Class balance. I got 3 lvl 70's and a 4th one quite close as well as several lvl 50+ chars. If you have played several classes it's easy to understand why a game depends on its class balance.