We don't know if this is true. For all intents and purposes, the dark urge may have different ending options than Tav.

... I personally also am not fond of Harm OCD Simulation Mode. Not to an extend I want it in every playthrough.

Relevant examples

-- Vision: good alignment in iron man mode.

It can happen that you botch a roll, but the additional threat of the Dark Urge may be overkill.

-- Vision: a set, pro social backstory

Yeah, nope. No. Not happening.

-- The plothole: when -- between your past and losing your memory -- did you become a devotion paladin? Why do you remember your oath?!