People who come from happy living homes in fantasy settings have no motivation to risk their lives and that happy home for an adventure.
The things that make the happy loving home work as a background are characters that either want to duck an arranged marriage or are so far down the inheritance chain they are going to be life long mooches if they stay.
Watch the movie “death becomes her” for great ways to fuck with characters that can’t die.
If it is, it’s based heavily off of the ttrpg mage: the ascension. The symbols and the technocratic union organization are from that game, the technocrats being one of the main villain groups. Though I don’t remember them ever going full “kill all humans” at any point.
Unless meta gaming is a problem, there’s no need. If meta gaming is a problem, it’s a bigger problem than this, and needs to be addressed. But I run a table for kids and I’m teaching them how all this works, it’s a little easier to tackle the meta gaming issue with the authority of being a parent.
I found that few people have the imagination to play both sides of their characters. They always try to be human mode or fairy mode, but that’s not how it works and it’s really hard to always think of your characters as being and doing both simultaneously. It’s a great game for the imaginative, but probably hell for a lot of other players. It does lend itself to LARP really well though. We did a huge live action game for a few summers with like 40 people and 3 GMs, it was tons of fun.
This is like the opposite of what OP is saying.
So one night we’re playing a modern era game and the BBEG and her husband are “holding court” at a very expensive night club. So all the PCs get dressed fancy, rent a limo, and bribe the bouncer heftily to let us in. A quick persuasion check and we’re in and snooping around. The GM wads up about a whole notebook. “I had plans for you to come in through the skylight, sneak through the kitchen, break in through the fire exit, even find a secret door to the basement. I never thought you’d just go in through the front door.”
So sometimes it’s the GM that fails to plan the simple solution.