Everyone hates nitwits, they are a mob that was created to literally be useless, that is their purpose.

However what if they were given trades for items you can't easily obtain in peaceful mode?

Bones Gunpowder Spider eyes Etc.

That way they are still useless for most players, but for people that like to play on peaceful they provide a way of getting resources that only come from mob drops (without having to use the limited amounts you find in dungeon loot).