r/DemonSlayerManga

I understand the main reason being there aren't demons anymore, so there's no need to build up crazy strength in order to match the demonic levels of strength.

But I feel like the very fact that there's a way a person can breathe that will essentially work like steroids is something that realistically be passed down and taught for self defense against other people and for sports like martial arts.

But even if the remaining demon slayers collectively decided to not teach it because maybe its too powerful or something, I feel like its eventually inevitable that scientists or athletes will rediscover breathing techniques and train with it themselves.