What makes you so sure that kids from Philly have any idea who Archie Miller even is? How many people in the country have any idea who he is? Yes he's had success but he's not exactly a household name, and for a lot of people, winning at Dayton is just as meaningless as winning at Boston U.
Your concept of how this all works is similar to someone who plays a lot of Madden or NBA 2k17. Unfortunately the real world is a little bit more complicated.
If Pat goes, you're going to see every relationship he's built here follow soon after.
So the question is simple... do you want to start from scratch with a new coach next year, or do you want to let Pat see this thing through with the most talented cast I've ever seen at PSU in 20+ years of following the program?
Because there is no other option currently.