Those who don't lose at trading never learn trading. No matter how big a trader is, he will definitely fail in any of his trading. When someone loses, he can learn from that loss if he wants to. Loss is a prerequisite to winning in gambling. I try to keep my emotions in trading when I lose. Every trader's emotions are difficult to control when losing. There are many traders who cannot control their emotions and at some point they end up losing more. A trader must acquire proper knowledge before trading. If the trader is not prudent then he will lose in trading.
When someone experiences failure in trading and learns about the mistakes they made then when they return to trading of course they will be careful so as not to make the same mistakes again in the trading that we have done, most people who are losing in trading will of course emotional because they lost the money they had, but if they can control themselves, they will of course rest and learn about the mistakes they made in trading, because if they cannot control themselves, of course they will suffer a lot of losses when they try to trade again in this situation. Emotions and knowledge are of course very important things for someone who wants to trade because if they don't have the knowledge, of course they will suffer a lot of losses because they don't know well what to do in trading.
That is how you gain experience, you make mistakes and then you try to not make the same mistakes again. This doesn't mean that you will never make the same mistake twice, there are situations where you could make the same mistake more than a few times, because it is trading and it is not a single day thing, you trade for years, and that means eventually you may make the same mistake sometimes, maybe it will have a year between each other, but it would be the same mistake.
That just means that you end up making enough mistakes where you end up learning more and more about how to just trade better. This is why I believe that it is better to just not focus on how to make a profit, but it is also important to focus on how to not lose as well.