Learn to tank as a Warrior or Druid and you'll know what it is to feel a lot of painful wipes. The thing is, learning to do so with the 'hard' class means you'll be able to not only do the other faceroll-easy classes with no problem, but you'll have more awareness, more sense of proper CD usage, and a better understanding of how to keep mobs in line.

As for warriors not having AoE, we are lacking, but, we can spec and glyph to do such things as make our charge stun additional targets, to make revenge and devastate hit additional targets, the Blood and Thunder talent is great for squeezing out additional threat. We have an AoE taunt; albeit on a 'long' CD. We can use cleave, we can use heroic leap, we have the ability to taunt when ever someone gets hit (Yes, I liked the old vigilance better, but the new one is still a great too). We also have an AoE stun (fear if unglyphed, but any PvE tank would glyph their Intimidating Shout).

We have more mobility than any other class right now with charge, Intervene, heroic leap, stance-dancing gives us Intercept, and if playing a goblin you also get your rocket jump.
We can get around better than any class, especially after the 'Great Druid Nerf' a while back. This makes up for a 'lack of AoE threat' since we can get to any enemy or party member with an issue.

Warrior tanking isn't the easiest, but don't undermine it.