The two situations have absolutely nothing to do with respect, in my view.
Kneeling on the ball ensures the win. With the quarterback protection rules, teams don't even try to force a fumble. The chance of winning when you take a knee and your opponent can stop the clock before it expires is as close to 100 percent as you can get in football.
Scoring points, on the other hand, puts the chance of overtime or losing back on the table. No matter how great your lead, the onside kick and hail mary means you're also at least theoretically at risk of losing.
If the Pats had gone for a touchdown in the Bills game, it would have been an all-time stupid decision. What if they miss the extra point? Then the Bills are just 8 points behind and they get the ball back with two minutes to play. Even if they make the extra point, teams can score twice in two minutes with the onside kick. Sure, the chance isn't high -- but it's a heck of lot higher than your chances if the othere team takes a knee. If I were a Bills fan and the Pats scored a touchdown, I would have been happy to be back in the game, and if I were the Bills, I would have actually let the pats score if they wanted to there.
BB wins close games because he understands the clock. One of the all time biggest NFL blunders I can remember occurred in a game I actually went to, between the Cardinals and the Redskins. Cardinals had the ball down by 1 with about 1:20 to play, and they had burned all their timeouts. 4th down, and the QB throws a pick -- the defender streaks down the sideline 30 yards for a touchdown. He's jumping all over the place, the crowd is going nuts, and people head to the exit. If he'd just knocked the ball down, or, better, intercepted it and then run to the Cardinals 5 yard line and then sat down on the field, they could have taken the knee and run out the clock. Instead, they got flagged for celebration, the Cardinals got a nice kick off return, marched down the field, scored a touchdown, made the two point conversion, and won in overtime. (Or something that like -- I think that's pretty close to how it played out.)
There's been many times when I've seen teams that are down by 1 point and are facing an impossible 4th down, deep in their own territory, like after a sack. I've always thought the much smarter play in those situations rather than trying to force a hopeless 4th and 25 would be to have the QB take the snap, run back into his own end zone, and place the ball on the field hoping that the other team is so stupid that they grab it. So long as a defender closes his hands on it, it's a TD, and the other team can get the ball back in better filed position with a first down, needing only 8 to tie. The smart play for the defender there would be to bat the ball out of the end zone, but nobody can resist the glory of a touchdown.