My experiment was instructive and, I think, says a lot about the limits of video games’ Game Master modes compared to the freedom of tabletop role-playing games.
Divinity: Original Sin 2 has a mode that lets players design their own Dungeons & Dragons-esque adventure inside the role-playing game, and in case you were wondering what kind of dweeb would port their homebrew D&D game into Divinity 2, the answer is me.