Oh I agree, there’s really no reason why using a weapon without any tanking passives couldn’t have something like an AoE taunt to encourage tank build diversity.
Would be a fair trade-off in certain circumstances, honestly.
The devs really can't have been clearer that they do not see AoE taunt as something they want in ESO:
https://forums.elderscrollsonline.com/en/discussion/comment/8064218/#Comment_8064218