I've read these money-making materials for 2 years, I don't think there's any answer that actually answer to why it doesn't work .. including this "how to come

I've read these money-making materials for 2 years, I don't think there's any answer that actually answer to why it doesn't work .. including this "how to come up with idea" question which is a "why I can't come up with good idea" question. With enough reading, I start to realize those are at best some heuristics for your "actually doing things in brute-force manner". If many lessons are actually working, the "90-95% fail" might be reduced to 60% by now.