Emotional control is also part of trading psychology. That is obviously very important for a trader as it will enable them to become successful traders later on. Experience and knowledge can support them, but as long as they are still afraid of losing, it is clear that controlling their emotions will be difficult.
Despite the fact that it's been talked about several times here, I still see some people disagreeing with it as if it doesn't really matter. Some people think that if you are just good with your trading strategy, you can begin to make profits, which I usually disagree with. There is every possibility that a trader can have a good strategy, but perhaps since we don't usually know the market direction, if a trader who doesn't have a good ability to control their emotions encounters losses, could they be able to bear the loss? Some traders will not, and that's not a good characteristic for a real trader. So, I agree with you.