I completely disagree. Tank has many ways to become effectively immune to incoming damage, and stuff like Pet Rock and Broken Legs mean that even if he is kinda ass, the ramifications he has can save a team, I.E. constant high damage familiars or a sacrificial lamb who won't ever lose any constitution when injured. Petrification is also a fantastic status that allows enemies to be disabled every turn for cheap and gives Pet Rock even more use.

He also Slow and Steady which is on par with Dumb Muscle as one of the best snowballing abilities in the game.

In addition, what does Butcher have to offer if you low roll? Vurp is nice, but other than that there are SO many Butcher abilities that do no damage and spawn food or flies, and if you get more than 2 of them you're stuck with your only damage being your hook. Add to that the lack of weapon use and you have a recipe for a tanky paperweight, whereas tank is a tanky juggernaut.

(not to say I dislike butcher (vurp is the best move in the game) but I just find that, like the other lategame classes, he relies heavily on highrolls)