If we learned anything from our current President it is that experience matters. Also, success in one field does not guarantee success in another. Having the skill to perform brain surgery does not guarantee one will be a great President.
He is right, just like brain surgery is not professional football. Dr. Carson is obviously very intelligent. The one thing we learned from Obama is intelligence is not a substitute for experience. Both are needed to be President.
In this most recent election, Obama had the experience.