Dear Riggs Sensei:
I believe that this may be one of the many times in life where there is no clear cut explanation for why a person acts or speaks the way they do. His statement is obviously vague, and he refused to expand upon it to make himself understood.
Perhaps he was speaking the truth, and does not like to bow to an image. Maybe there was something in the demonstration or the art he didn't care for, but he was afraid to admit to you. Maybe his father or another berated him as a child, and he simply cannot express himself. Maybe someday he will learn that it is his "cup of tea", and come back to your dojo to train.
With best regards,