Perfect example is a guy I worked with today. He was riding a colt that he said he had put 50 rides on. The horse was only half ass neck reining and sidepassing and only when he felt like it. His stop was complete crap and it was a fight to get him to back up. I am using a colt that now has 12 rides on him and behaves better and knows more than his colt with 50 rides.
Not everyone knows how or is willing to teach them as quickly as they are capable of learning.