People especially newbie ignore this stuff. Their goal is to have huge profit so they often tend to risk a huge percentage of their portfolio. They don't think about any risk and just think of the outcome if the market favors their side. They will just realize their mistake when their portfolio is more than 50% down.
Learning those strategies requires strong discipline to control their emotion which is the most important for me to avoid huge loss in trading. Even experts sometimes forget their trading strategy because of greed.
That type of struck and "do not get out of your way for no reason" mindset is not an easy one, of course it is not impossible but it is not an easy one neither, that takes a while for most people and we should not be hoping for something like that anytime soon neither.
I believe that the best thing we could do is learning how to make mistakes, and learning why we made those mistakes and then trying to make those mistakes again. I know that it is not going to be a simple thing to just go out and make mistakes because it is our money we are talking about if we lose, but without that, we are going to just try to profit and involuntarily make mistakes which will be much worse.
mistakes in the past being the best teacher, an experience that should really make us able to avoid the same problem. It takes several tries to avoid the same problem, every trader has their own strategy, but what is certain is that avoiding losses is something that must be done. We also have to have control over the trades that are being made, lest the traders only get losses.