I don't believe, "You Learn More from Losses than from Wins" because that's incorrect. One can learn both ways. In fact, I learnt more from my wins than I did from losses. You talked about losses like anyone wants to have them and then readjust from such. If there's anything losses will even do to beginners, it's to scare and discourage while introducing them to reality.
This is a notion that have been propagated in our minds that somehow undermines the confidence you get from wins as well. For some reasons, I tend to agree more with the notion that we learn more from our failed attempts than we do from our wins.
Winning remains the goal and everyone hopes to win but, having so much success sometimes , makes us undermine the effort that was put in the process to archive that goal. You go the length of even trying other means which could lead from, changing of technique to adjustment of materials and when you fail, you know where yo draw the line.
No one wants to fail for for and that's why, we experiment but failures helps you to draw the lines and not many do that in there wins.