innerdude
Legend
Then you just end up in a game with some really silly and stupid results that don't make sense within the context of the campaign.
Player: I open up a rift in space and time, exposing Capone's men to the face melting presence of the Nuclear Chaos, Azathoth!
GM: Uh, we're not playing Call of Cthulhu.
Player: So what? I get an Ability roll for things not specifically covered in the rules. Are you denying my agency?
This post is profoundly misinformed and a complete mischaracterization of fiction first RPG play, and yet for some reason is always the first line of defense against player-facing agency mechanics.
"Trust your GM; (s)he knows what (s)he's doing and will optimize for the greater good. But the rest of the players in your group are moronic nitwits who will totally wreck your fun, so they should be denied all ability to engage with the shared fictional space directly."