There are many contradictory things you may have been told in your life, but when I first heard this sentence I was like, "Are you being serious right now?" Don't worry, maybe I can persuade you by rephrasing my statement. Instead: Stop focusing so much on your weaknesses, and try to focus only on maximizing your strengths.
Focusing solely on weaknesses within a business DECREASES PRODUCTIVITY by over 25%. For any employer or business manager this knowledge is crucial. So how can we avoid this while still making our employees better. The relatively knew concept of focusing on your strengths instead of your weaknesses is a world-changing perspective and helps to keep employees happier, more engaged, more productive, and more successful! So make sure that employees may understand areas that have room for improve but make them focus on what they do well and capitalize on that instead!
This video by Eva Katharina Herber is an AWESOME video and explains the concept in a very concise and interesting way.