What's ridiculous about this, for me, is that I have successfully done both those activities in the past. I tanked tier 9 on my druid when my 10-man team needed a change of pace, and I spent significant periods of time in Arathi Basin circa level 45 back in Burning Crusade, also on my druid. Feral PvP was fun! And challenging! Those were the days when you couldn't transfer directly between druid forms; you had to shift to caster form in between (i.e. bear > caster > cat), so there were some different challenges to manage compared to PvE, and I like that! Oh, I also tanked on my paladin when he was a lowbie - Shadowfang Keep, Blackfathom Deeps, stuff like that. Considering I once had so much fun doing these things, I have no idea why I find it so intimidating now!
Do you have any similar hang-ups in WoW? What aspects of the game intimidate you? What would it take for you to give it a shot?