This is soo interesting! I myself having a hard time seeeing something more vulnerable than showing of my baby creation of 30 years, opening myself to the potential critisism - maybe even ridicule of how stale and cliche it is. Maybe outside eyes are going to see hundreds of minor inconsistensies where my blind eyes of love has only seen perfection?
But they won't, and can't, because as has already been established, the players can't criticize or comment. Anything they might have a problem with is on them, not on the GM. If that wasn't established, I don't understand why we led with the toy-owning child vetoing any and all things they think could cause harm. Poking at the inconsistencies of the world would clearly be harmful. It won't be permitted.
Not to mention me putting Tredorar the Terrible on the line! That is a tough pill to swollow, but they have deserved a fair shot. And at least the integrity of my world would still be intact, even if it's frighfull history shaping presence might now become but a memory.
I was under the understanding that the GM--like the toy-owner--would not allow anything they think even
might be bad. Hence, they must not think very much of Tredorar the Terrible. By your specific instruction, if the players ever tried to do anything the GM would consider harmful, it would be prevented, and the players would instantly obey without comment or opposition of any kind. Had it actually made the GM vulnerable, had it put them genuinely at risk, they would have stopped it. Because they have that power and use it, per your own instructions.
Allowing yourself to be vulnerable before others means, y'know,
not just being able to instantly--and without any response--nix anything the other person might do. You have to be willing to risk someone doing something you'd dislike. By your own statements, this GM never permits something they would dislike.
How can two persons look at the same situation and see somewhat so diemetricaly different? Even to the point that you didn't seem to be able to produce my vision when even prompted about it?
Well, it seems to me that the biggest problem is that you aren't applying the same rules as you set out in the original example. You're now describing a GM who is in fact willing to accept radical, even detrimental changes to their world. They might recognize that a change would be something that could harm their future enjoyment of the world...but
don't have the ability to demand instant and no-criticism/no-commentary abandonment of any such effort. They are willing to accept actions that would reveal problems with the toy (such as, for example, revealing poor construction of said toy...or said world), or potentially even change the toy to such an extent that they can't enjoy the toy the way they used to (such as breaking or losing some part of said toy...or said world.)