with a bunch in 2019 as well? I'm not underestimating anything as much as you're totally ignoring how much having success in this offense means to the NFL. You won't even acknowledge the truth of it. Dudes who hardly did anything were mid to high draft picks because of it. And Mangum isn't getting any younger.
You have a strange sense of logic. Being informed that teams want you is pretty good logic. If he leaves, it will have absolutely NOTHING to do with his liking or disliking BYU. We already know what the answer to that is.