Now this is how I know they didn't watch AOT with understanding. Demon Slayer has its tragedy sure but... Comparing it to Shingeki No Kyojin? Come on now the level of pain and suffering is on a different level, only one other Manga compares and that's the inspiration for Isayama's writing BERSERK.
I know the article is about Anime but oh well still applies since the Berserk animes have failed to live up to the manga and most animes are based on a manga so this still applies...