BTW this guy gets it below
You ask the question as if "there is some mechanical, objective way to determine best." There is not. So, my answer I want "the most deserving." Why, you ask? My answer because THEY EARNED IT. That is what sports is about. Earning it. There have been many, many, many times over the years where "the best team or better team" did not get awarded something because they did not earn it on the field. It might have been misfortune, a bad bounce, bad weather, bad officiating etc.
They didn't earn it, so they don't deserve it, regardless of whether someone thinks they are the best or better. If there was a way to measure the best with some kind of computer, even then I wouldn't pick that team if they did not earn it on the field.
You can say all day long, PICK THE BEST, PICK THE BEST, PICK THE BEST. But, guess what, those picking can and do make mistakes. How many people were picking Oregon to beat Washington and Bo Nix to waltz in for the Heisman? The answer: A lot and many of them were the same types of people on the committee.
The reality is that these people thought Oregon was better and Oregon would beat Washington. Now, maybe, Oregon is "better" by some sort of metric. However, they did not earn the title of better because they lost on the field, misfortune, bad bounces, bad officiating or just plain getting beat by a superior team.
It is a cop out to say "four best teams" because that is what we play the games for. I will say it again: If some prognosticators can actually pick out the four best teams that would always win the games, then why not just let them pick, save playing most of the regular season games to avoid injuries and then have the playoff with the selected teams.