Isn't the whole point of University to learn, gain knowledge and improve on your skills? If you have already maxed out all your skills what's the point of taking the class lol? You wouldn't take a Chemistry 101 class if you already know everything in chemistry and you have taken biochemistry, mechanical chemistry, and blah blah. University is called higher education because you want to further enrich your knowledge beyond the simple basics you learn in high school. :)