How do I make my players mindlessly obey my ideals?

I'm the DM, so obviously that means I can do no wrong and whatever I want to do at my table is right. My players however seem to have weird notions of "agency" and "my own playstyle" and nonsense like that. Like one who's a total powergamer. Doesn't he realize that he's just a monkey to dance according to my drum, like all players are? As are all the players? What the hell makes these players think THEY have any "agency" in MY world. They'll do what I want and they'll thank me for it.

edit: Asking for a friend.