Obviously I cannot speak for
@EzekielRaiden. But to me, it seems that once we accept that
who has narrative control and how the decisions points are made will change with the system used then the notion that all RPGing is basically the same has been blown out of the water! Given that RPGing really is nothing but the process of making decisions about the content of a shared fiction, if we agree that that process can vary, we are agreeing that RPGing can be very different in how it is done.
Doesn't matter to what? I can tell you that it matters profoundly to me. I have zero interest, as a GM or as a player, in RPGing in which the content of the fiction is all directed by the GM. And there are other RPGers who have zero interest in anything but that!
Given we're talking about a game of
making decisions about the content of a shared fiction, how could it not matter what the process is for doing that. I mean, no one thinks that the differences between soccer and AFL football don't matter, even though both a team ball sports that involve kicking a ball through a goal to try and score points.