It's just a coicindence that we've never played a non-division one school. Pure historical accident. If we were to schedule such a team, it wouldn't represent a change in policy at all.
I wish our crackerjack beat writer contingent would ask a real humdinger of a question:
Which SEC and Big 12 teams have we asked for a November home and home, and received the bird?
Their conundrum, such as it is, is finding a team that will play a one and done with us.