You missed the most important thing, an actual edge, the vast majority of daytraders don't have any real edge. Trading psychology is great for risk management, but don't expect to make money just because you know how to lose money properly. From what I saw on reddit, 99.999% is fairy dust , almost nobody has a real edge and they blame the psychological part, or even worse, they start saying that the market is random and TS is BS.

The stock market is not random, and TS is definitely not BS, at least not entirely, many things used by retail traders can be considered BS, but TS to the core is real. There are a few daytraders who are billionaires,and at least one of them is using TS.