Those options might be useful on a multi-user system, but on pfSense most everything runs as root anyhow, and you're logging in as either root or admin, which is just an alternate account for root. There are no other users.
As for OpenVPN, the user rights don't matter much, again, because everything else is running as root. If it's commented out, it's likely because something broke with that enabled, but feel free to try it again and see if it works.