Or, the most likely, he hates his role as it stood at Purdue...and, it was not because his playing time was going to be reduced, but rather, that he was a scoring guard playing out of position for the better part of his career and doing little more than throwing post entry passes, and, he did not want to do it for his last year.
The collective management of the position a year ago (Newman included in such) was not great, and, it led to 2 guys transferring...one having lost the better part of the year...no proven PG...and, a ton of questions at the position(s).