Totally disagree. I am not free from the consequences of my actions. I'm simply saying it's a waste of mental energy to drag yourself down based on events that happened in the past. You can learn from things you've done and if something was a mistake in hindsight, you can avoid those mistakes in the future.
But I try not regret making any mistakes I've made because there's no point. You can't objectively judge your decisions if they're clouded in an emotional haze