I am more likely to forget regret and take the important side that I can learn to be better in the future, in this case I am more relaxed and do not need to panic or do things that could hurt myself, here the importance is that we can control myself because if we continue in regret we will only harm ourselves.
There's nothing wrong with regrets because we are only human were not perfect that's why it's natural to commit mistakes. What's more important there is you experienced it and you can learn from it. As you learn from in your next life event in the business world or even in the real world, you can apply the life lessons that you have learn from your past mistakes.