I wouldn't put it quite so uncharitably, but I agree with your skepticism. It seems very much in line with the way the individual lessons put much more focus on

I wouldn't put it quite so uncharitably, but I agree with your skepticism. It seems very much in line with the way the individual lessons put much more focus on the kanji writing system than on the Japanese language itself, which IMO is a common strategic mistake made by beginners who are self-studying.