The latter conclusion remains, that the graduate is not confident in the technique he has been taught as a student. I believe a good deal of the problem is that the student has not really learned the technique he was taught in college. He has taken the course and gotten a passing grade but really not learned the technique. You do not learn a technique only by knowing the position, the contact, the line of drive, etc. You learn by one means only repetition.
Any art form is learned by repetition.
In fact any thing is best learned by repetition. Contrary to the old saying, experience is not the best teacher, repetition is. Doing something hour after hour, day after day, week after week is the only way you become proficient. Van Cliburn became a great pianist and Willie Mays a great ballplayer because of one thing practice, practice, practice. They had natural abilities and good teachers but there are probably thousands of men and women with the same natural ability who have not developed that ability and become skilled.