Ah, academics and their arrogance. I suppose what mr. fancypants professor was trying to say was that Romeo and Juliet was shit, so much so that Shakespeare must have been joking. Personally, I love me some Shakespeare, but Romeo and Juliet is the oldest incarnation of the "chick flick," which teaches children and teens that there's no difference between a crush and true love, or that you can know you want to spend the rest of your life with someone when you haven't even had a proper conversation with them.
Or maybe he meant that it's naive camp, which would be my opinion.