This is a horse manure take for one simple reason - Von's game-winning contribution against the Chiefs alone was worth 3 net wins from a conference head to head POV vs the Chiefs:
+ 1 for the Bills win
- 1 for the Chiefs loss
+ 1 for the tie-breaker
And that's before we factor in his contributions in wins against the Rams, Titans and Ravens.
IF we win out (which will be difficult), then the season-ending injury notwithstanding, Von would have made a substantial contribution to the Bills getting the number 1 seed.