This is an absolutely liberating mind set
RN
I do believe that is the final piece of the puzzle...Regardless of how many hours of screen time one has, or how many years they have in the markets, if you can't free yourself of the fear of losses, it's all a waste...And more than that, it's a massive hindrance because it will creep into your trading in very sublime and unexpected ways...
As an example, that fear of losing will keep you from taking the best entry (the old "wait for confirmation" rationalization)...then when it appears "all clear", that fear of losing will create the impulse to take the trade far enough away from the more advantageous entry....that "fear of losing" will also make one want to get out ASAP of winning trades...oftentimes hang onto losing trades a bit longer (hoping they will come back)...
Like I said, I believe it is such a significant aspect to trading, that nothing else really matters.