For it being wrong, and much more probably that everyone just misinterpreted it. Breaker of Infinities confronts the earlier Avatars over this plan when they discuss Aang's duty to bring peace towards the world by defeating the Fire Nation. Hedo also reluctantly made use of his grandfather's schematics on Cell https://andrespyeed.jiliblog.com/92874770/facts-about-matilda-1996-revealed