How many times have you seen an outstanding performer promoted into the role of leader and then observed a meltdown in performance?

People need to abandon the idea that successful sales = successful leadership. It never worked, does not work, and never will work. We all know this. We see it all the time.
Leaders need to know how to sell, not be the best at selling.
Leaders need more “smarts”, better planning, different interpersonal skills, and different attitudes  interests, and motivations than individual contributors do. Past performance cannot accurately predict future performance when future performance requires more and better skills.