IIRC, the necrophyte job is supposed to represent voluntary "ascension".
It is a choice that pops make of their own free will.
A nerve stapled pop lacks free will, as per the description of the trait:
Unessential neural pathways relating to self-preservation and free-will are severed, creating a docile and obedient client species.
Though it can be noted that, according to the wiki, the necrophyte job has these modifiers:
- x1.5 Charismatic trait
- x0.75 Nerve Stapled trait
- x0.75 Docile Livestock trait
- x0.75 Enslaved
- x0.5 Repugnant trait
The NS and DL modifiers are pointless, as those traits prevent the (specialist) job from being taken in the first place.
These modifiers can only add pointless CPU calculations, I guess.
(It seems like the necrophyte job may have been originally designed as a worker-level job, whose modifiers were not updated following a design change.)