Hussar
Legend
Not so much all RPG'ing, but, rather, what D&D is as such. And since most people here are primarily D&D gamers, D&D tends to be synonymous with RPGing. This is why these kinds of arguments generally don't happen outside of D&D - if you're playing Game X, then generally Game X will fall within an acceptable tradition for Game X. If you want something different, you simply change systems. Most people aren't going to use Call of Cthulhu to run a kingdom building game, for example.It's because a certain tradition is taken to be what RPGing is as such.
But, D&D is a much, much larger tent.