Many self-help books feel like expanded blog posts. I don't think a lot of people ignore the genre because the genre is mainly written by men, as you say -- it's a popular genre.

After trying to slog through Atomic Habits, Essentialism, and other highly recommended titles in the self-help world I've dropped self-help books from my TBR list altogether. I've had more success learning from family members, friends, therapists, and diaries.