I wasn't asking why it's accepted by culture, I was simply highlighting there are ways to run an RP without a GM and it can still work well. It should also be noted RP's are not the same as say running a nation. There's far less people to deal with, and really only one main focus/goal in the end. To have a successful roleplay, as opposed to say covering all the necessities of living.

While no set leader in a political system is suicide, it is something commonly proven to be a viable system in running an RP. I'm mainly just arguing the "One size fit's all" mentality approach that seems to be happening here in that all RP's need a GM, and all GM's must get themselves involved on player conflict.