Except that it showed that you don't know much about the NCAA Tournament despite lecturing people on not knowing how brackets work. At large teams are never in the bottom quartile of the tournament.
Actually, it is relevant, because you thought there were several spots we could fall to. Now you know that the floor is #12. That left us with very little wiggle room. Ask the 2017 UM baseball team how bad a couple of upsets in obscure conferences can hurt you.
A 12-seed at the absolute worst, and even that rarely happens. Usually, the lowest at-large seeds fall in at #11. So the answer to your question is easy. If we're a #10 after beating BC, we would have been an 11, 12, or completely out with a loss.
If it meant that those teams are comfortably in, they wouldn't have a specific listing of the last four byes. The fact that bracketologists point out the last four byes should be a hint that it means something.
Talk about not understanding brackets. At-large selections don't get seeded 13-15...