Only the idiots don`t track and analyze their performance and loose everything.
Perhaps your advice will be helpful only for the newbies.
No, I'm sure even professional traders will not find time to track back their performances and it eventually will be leading into repeating their own mistakes. I do not find any wrong on having such a topic as it must be helpful for both experienced as well as naive traders.
Keeping track of our performances will help to eliminate same mistakes in trading.
In that case, I would not call them as professionals as I believe professionals are purely treating trading as their main job and their source of income. Keeping your performance is a must, that will tell you if you are performing well or not, I hope even if we are not professional traders yet, we can learn how to do it.