So if the GM always has agency, is that artificial?
For my part, when I am sitting down at the table to play a game, I want all the participants to be participating, not just one. If the game is principally about establishing a shared fiction and seeing how it unfolds, then I want everyone's imagination to contribute. And if the game is going to involve the distinctive, asymmetric roles that typify RPGing, then I want the allocation of powers and responsibilities to those roles to be well-designed to ensure that everyone gets to contribute.
To me that's not artificial, it's just common sense game design. The idea that RPGs should be distinctive, in that the so-called "players" don't get to do much playing, isn't one I can get on board with.
It's statement like the bolded that is insulting to everyone who enjoys playing D&D. You have to know that's not how virtually all people feel at the table.
Artificial: not like real life. Example: Having full knowledge of consequences of every action you take is artificial.