“So then it’s onboarding people, teaching them how to play D&D, which is really complex”
In fact, you can also miss out on some amazing story and interaction by succeeding rolls. Just like real D&D.
One of the things that’s so impressive about this game is how well it handles and reacts to the variety of different decisions, succeeses, and failures you can make. Failing a roll in one spot likely just puts you on a different path, with a slightly different story.
In fact, particularly in narrative focused games, failure is just as important, if not moreso than success. How interesting is a story, really, if the characters never stumble or face hardship? It’s not nearly as compelling if they succeed at every turn.