What truly affects investors is,
It's not about what method he learned,
But rather what kind of thinking he learned.
A person's way of thinking determines his life. Logic of thinking is not knowledge, nor does it produce knowledge, but it determines how a person uses the knowledge he has learned and how he processes the information he receives. Most people learn similar knowledge, but each person's different application of knowledge and processing of information determines the differences in their lives. Investment is the same; the logic of thinking is the most important key factor that constrains investment returns.
This is why the news everyone sees, the information they hear, and the price fluctuations they observe are the same; some people profit while others lose money.
The logic of thinking is the first cornerstone for a person to gain investment returns.