Well, people do feel like they are really solving a real mystery for real when they solve a real mystery for real.I didn’t say there’s not a difference. But I do think it is all about feeling. That for you (or a given group) it feels more like solving a mystery if you know the facts have been predetermined by the GM.
Maybe you don't follow the news and things like True Crime.....but.....this very much happens in real life.Right. But mysteries don’t have creators that oversee their creation and how all the details fit together. More importantly, they don’t do so with a sense of how to present those details in such a way as to function as a game of some sort.
Though in the classic tradition game the players are (solving the mystery), as the characters are (solving a mystery).This is why I’m making a distinction between what the characters are doing (solving a mystery) and what the players are doing (working out a logic puzzle).
Just note there are real game styles were the players do solve real mysteries for real.The players aren’t solving anything in either game. They are pretending to solve a mystery in both games.
I mentioned this many pages ago: This is just the anti-DM feelings. Some players hate the idea that "one of the other players" is more powerful then them...in the game. This is after all why all the games that limit the DMs power even exist.But for others, the fact that they know there’s one participant who knows all the answers and has constructed this mystery and is running the game will make it feel somehow lesser. Especially the more the game shifts away from the what might entail skilled play of the game and more toward a test of the players’ skill at figuring out the GM’s puzzle. That they know it’s the GM’s puzzle makes it lesser in some way for them.
And it's not just mysteries....it is everything. And it's really the point of the whole thread.
My game: The player has their character cast alarm....and as DM, I on a whim say "eh, the Alarm becomes a Living Alarm Spellshark and bites your character!" and the player has to play with that happening in the game......or leave my game.
The Other Games: Well, scroll back to the OP. The game rules limit a what can happen to a small amount. And is very positive towards the player(s), of course....
I find Scooby-Do mysteries work well for most players. Move up to Nancy Drew/Hardy Boys for slightly more intelligent players.This is before we even get into the quality of the mystery that has been constructed by the GM. Make it too easy, and it won’t seem very satisfying. Make it too hard, and play may stall out.