Absolutely, I really learned some of my mistakes, like many investors, and it really brought me a lot of losses, but it's better to always learn from the mistakes of others, for this you can use this forum not to repeat the mistakes of other investors, but to try avoid them.
Mistakes make you to be smarter on it for the next round you take it when you learn about it more than you learned before. You cannot learned from mistake when you are not going to analyze why you make a mistake. Learning for experience improve yourself on doing the same thing again. Everyone can learn from the mistake of others too and get an idea how to avoid it when you are going to take same process.