If the DM tells me that such a ruling is being made in the name of PC-NPC symmetry with the intent that those social mechanics work the same no matter who in the setting is using them, I'd go along with it for that reason alone; and I say this as someone strongly in favour of player agency.
A far better way of achieving the same end, though, would be for the DM to just strip social-skill mechanics away from PCs. If the NPCs can't railroad you, why should you be able to railroad them?
As DM I can always say your social-skill mechanic doesn't work. We only use the dice if there's uncertainty. So as long as a player I can always say I can't be forced against my will we do have symetry.







