I literally can't even with this.
Yes, a TV show based off of a property that came from a role-playing game will have nothing to do with the game, as in the collection of rules that structure play. Any more than the output from playing the game will have anything to do with the game (since the result of playing the game is story).
But a large number of games have unique, identifiable, and characteristic elements to their creative expression. That's what makes them a creative property. The direction that the flow of adaptation follows doesn't matter. It can be a book first, turn into a board game, made into a TV show, made into a role-playing game. There's still continuity of the core, identifiable elements of the property. That's what's important. Nobody cares about this weird fetish of it not being about "the game".