basically psychology becomes the most important in determining trading success. there will be many problems that will be faced or a problem that we repeat ourselves because we often make the same mistakes. that is why our mindset and our mentality are of utmost importance, because even with great strategies that may be the same as those used by famous people, but if our mentality is still problematic then it will be useless. therefore creating a framework and running it according to plan is the first step to forming trading intuition
If you are trading with emotions and think that you could do better than others based on your gut feelings then you will lose a lot. You are right that people make the same mistakes because we repeat ourselves, and that should be something to be careful about.
If we could realize the fact that market doesn't care about us, and the market doesn't go up and down based on whatever we do, then we will realize how cold and ruthless it could become. If you use that to your advantage and leave all of your emotions aside and start making a profit based on what you see and how market moves instead of what you "feel" it will do, you will start earning a lot.