K-line is just recording the facts that have happened and are happening in the market. If K-line is useless, it means that the behaviors in the market are invalid. Isn't this nonsense?

No one jumps like this. Many people always criticize that analysis is useless, this analysis is useless, that analysis is useless

The market is made up of people, and people's behaviors can be analyzed (involving psychology and behavioral finance), so why can't K-line be analyzed?