But, you forgot to reference preseason rankings. Some teams were rated "tough" and turned out "weak." Others were rated "weak" and turned out to be "very tough." You simply don't know who's good and who's not until they play the games. As an example, this year the Bills seem to be one of the favorites to win the Superbowl. If we beat up on other teams, people might say "they beat weaker teams." It is clear that the best teams make other good teams look weak. Alternatively, if we lose a bunch of games, people might say that the Bills faced a "murderers row" of tough teams. Maybe not. You just can't possibly know.
Quoting post-season records is hindsight. Next February, our 2022 schedule might in-fact be ranked quite different than 12th hardest.
My point was simply to say that any given week, one team can make another team look weak or strong. Yet the very next week it might be the opposite.