The inability of ability to leave vs monarchy is a key part as in a practical sense a lot of people do not have the means to leave or other place to go. That's not the case in terms of "do I play in this game" as the door or another table is right there and there are other games if the players choose to boot their despotic gm.Though I understand that you are arguing that a GM's power requires a governing consent, I don't think that the absolute power of monarchs, for example, is measured by the (in)ability for its people to leave.
It's almost as if this is actually the problemic issue(s) that I have been talking about all along.![]()
The key is can you change your ruler or not? Any player can. The only power or authority the hm holds comes from how much folks want to play with him as a gm. (Note to there possibly being exceptions where parents tell kids they have to and other oddball cases of external authority creeping in.)