even if it wasn't blocked by physical armor it'd still be pretty bad

a taunted enemy can run past whoever taunted them, approach another character entirely, and use an aoe spell to hit the second character, completely ignoring the taunter

they aren't technically "targeting" another character, so it works within the parameters of how this game processes taunt, but it makes it completely pointless. i've only ever used it on incarnates as an afterthought, and it's actually been useful probably enough times to count on one hand