Bedrockgames
I post in the voice of Christopher Walken
The deliberate aspect is exactly what I’m citing. The GM crafting a mystery is placing things with the intention that they are found. What they are doing, whether they admit it or not, is creating a scenario that they intend to be engaging as a game.
That is not what a criminal does. They’re not concerned with how much fun it will be for people to solve the crime. They’re not actively deciding what sorts of clues to leave behind. They’re not also somehow responsible for other factors like witnesses and the weather and the like.
It’s a bonkers comparison.
But no one is saying the GM is like a criminal committing a crime that is then investigated. That is kind of a strange argument frankly. The GM is attempting to emulate mysteries and investigations (both in life from the news, but also from shows, novels, etc). Also not everything has to be set down with the intent of being a discovered clue. Some stuff is going to organically arise. For instance the GM may not have thought ahead of time about security camera footage at an apartment building where the crime took place. A thorough GM may, but some won't. So if the players ask about that, then the GM may have to make a call about whether there was security camera footage, and then based on his background details, if the killer was caught on camera anywhere. So there are also gray areas. But those gray areas are still generally grounded in whatever has been established.
Also I just want to point out again, this was a side tangent, it was a passing remark I made and for some reason, referring to this as actually solving a mystery has really provoked a strong reaction. I am not even interested in proving the point anymore. But I think the argument you are making is just obviously not true if you've every played a mystery where the characters are solving something