This is a favourite saying of companies pretty much everyone whose ever given advice about anything. But as we know, advice is a form of nostalgia, and while nostalgia can conjure important and worthy emotions, it’s not something to live a life by. Personally I believe that encouraging anyone to not make the same mistake twice is bad advice. Any skill I’ve mastered, which was worth mastering involved me making the same mistake over and over again. Repeating the error until I had got it entirely out of my system.
A better version of this advice is as follows: Making the same mistake is fine, so long as you are making it on purpose.