The psychology of being down by 3 vs 4 late in a game is so ingrained in football (coaches and players).
Down by 3 - you feel like you can 'play it safe' and still kick the field goal to tie. You're less aggressive. Extend the game and take your chances - even thought the other team still can come back and win with a field goal.
Down by 4 - full desperation and you're gonna do everything you can to score a TD, including going for it on 4th down.
When the Bills were on that last drive, i knew we had to score a TD there. So I had no problem with Josh looking for Shakir in the end zone. Split second sooner before he gets bumped on the throw, and that's a TD. He was thinking TD but coaches were playing not to lose. I had no faith in Bass and even if he made it, Mahomes against our depleted defense at the end or in OT, forget it. It would've been just as heartbreaking.