If what you said is true then we're headed for a tournament of only P4 teams, because it has never been about finding the best 68 teams (or 37 if it's only at large). It has always been about finding the most deserving teams. There is no doubt that Auburn is a better team than Miami OH. But I don't find a power conference team with 15 or 16 losses on Selection Sunday all that deserving.
So yes, it appears our criteria is very different, but yours is also very different from what the actual committee does. I'm not saying playing 31 D2 teams and going 31-0 should get you in. Miami OH played 3, which I agree is 3 too many. They also played in a decent mid major conference and would finish at 18-0 in this hypothetical. That's impressive regardless of their OOC schedule strength