Two Sets of Rules, the Good and Bad?

[NorthernPhoenix]

There is no controversy over whether "whether the DM should have to use the PHB rules". Literally nobody on this thread is arguing that position, ergo there's no controversy.

There are people though who seem to be arguing that a DM should never use PHB rules for NPCs, and others who disagree. Ergo, controversy.

The OP clearly wishes the DM would use more aligned rules. That is the "argument" that has created the thread, and if it has been thoroughly enough debunked, then that's great. Though you see the attitude often enough on forums like this in other threads, mostly in the context of simulationism. The DM shouldn't use PHB rules for NPCs because it's pointless. You can if you want to, just like you can stand up and turn around three times before you roll your dice.