Even if you ascribe more weight to the DM (which I don’t), the compelling reason has to be compelling to the other players.
If the reasons for bans or restrictions aren’t compelling to the players, they’ll just do something else. Maybe play a board gsme, maybe another player will DM a one-shot.
There are a couple of things I’ve noticed. It seems that those that push back against “DM’s word is law paradigm”:
- tend to play with their friend group; and
- play in a group with multiple DMs.
To me, this makes sense. If one of my friends has an issue with something in my game, I will accommodate them. I do not assume that the player is being petulant or difficult for no reason. It also means that if a DM can’t justify why they are excluding things, someone else will simply take over.
Meanwhile, those arguing in favor of DM authority :
- tend to be forever DMs;
- tend to believe the player is a problem player;
- tend to believe that all the hard work they do as DMs justify the exercise of DM authority.
Naturally, it seems to me that the 1st point and the 3rd point are related. If you make a big deal about how much hard work you do as DM, then you are probably going to have fewer players that try it.