Detroit also MUST lose (or tie) against either Minnesota or Chicago. No way in without that. If they win all remaining divisional games, that’s three more wins and the best we can do is tie them and they’d own the tiebreaker by way of divisional record.
In order to beat them outright without tiebreakers, we need them to lose more than three games, which naturally must include a divisional loss given their remaining schedule. A tie against Minnesota or Chicago would also work if they lose all three non-divisional games.
Don’t these sorts of sites usually include postseason? We definitely also beat them in Super Bowl 1 but that’s not listed there.