If you have one person in the country who is, like, the best at explaining calculus, that person maybe should teach every calculus class in the country.
It'd be helpful if we could work through the idea that good teaching is good explaining and vice versa. Someone here at Twitter Math Camp mentioned she conducts a math night for parents at the start of school. "I wish I had learned math like this as a kid," they tell her. That realization, that there is and should be a difference between how math was taught then and now, is a giant first step.