I'll just throw this out here.
For some people, social pillar is one where they actually role play as it leaves most room to free form. Robust mechanics for social interactions is viewed as gamefication. Combat itself is already gamefied pillar. It's pretty much all mechanics dependant with little room for free forming. Turning social pillar into social combat with robust mechanical sub system where you can settle everything via dice or character abilities, just makes it more like co operative board game. And to be honest, some old adventures are pretty much boardgames (looking at you Tomb of Horrors).