Bill Zebub
“It’s probably Matt Mercer’s fault.”
Personally I don't think you should have to have those skills to be a good GM (although GMing is an excellent way to learn those skills). That's literally what the mechanics are for.
If so, that raises a difficult question (at least for me): are social mechanics there as scaffolding for DMs who can't amuse/deceive/persuade, or are they meant to replace those skills for all DMs?