RPGMemes

For your example, I'd probably still ask if the players wanted me to let the dice decide or not before rolling. My players once had a clever idea of setting some poison traps and using earthbind to deal with a wyvern. The thing made all of its saves and nothing worked. I could've lied, but we'd already agreed to openly roll and abide by it. Would lying have made it better? Maybe. The game carried on and that arc had a thrilling climax later.

Alternatively, if we'd been playing a game that has a "succeed with a cost" / "fail forward" mechanic it could have been satisfying. D&D and close relatives are especially prone to disappointment because of how random and binary they tend to be.

Anyway. All of this I think it reveals a difference in how RPGs are enjoyed by different people.

On one hand, there's going for immersion. The player wants to be in the world, be in the character, and feel everything there. It's very zoomed in.

On the other, where I hang out, it's more like a writer's room. I'm interested in telling a cool story, but I'm not really pretending to "be" my character. My character doesn't want a rival wizard to show up, but I as a player think that's interesting (and maybe want the fate point, too) so I can suggest that my "Rivals in the Academy" trouble kicks in now. I enjoy when I can invoke an aspect and shift the result in my favor, or when I can propose a clever way I can get what I want at a cost.

Neither's better or worse than the other, so long as everyone's on the same page. It can be bad if half the table wants to go full immersion and just talk in character for two hours and the other half doesn't.