They don't have enough data, the rule change hasn't even been in place that long. I get where people are coming from but at the end of the day the defense has a job to do and in that game in particular neither teams defense decided to show up which is unacceptable especially for Buffalo with the #1 defense.
Using the #1 defense as an argument isn't really the point you think it is as it's ALWAYS about matchups.
The 1985 Bears nor the 2000 Ravens went undefeated. Granted, neither had a good offense, but they did have historically good defenses and still lost games. It happens.
Also, With the lack of games in the post-season that go to overtime, it would take decades to arrive at truly significant data and the NFL has never waited that long to fix problems (well, not in the past 30 years, anyway... before, yeah, for some things)
10-1 is enough of a set to LOOK contextually at the data and insofar as they've looked, they've seen enough of a pattern emerging that they are going to address it.
The example I would use is the Broncos v Pittsburgh when Tebow was the QB. Dude played like garbage for the entire game and the Broncos D balled out, but Pittsburgh was kicking their butts and but for the Broncos D and one play by Tebow in the normal time period, it's a blowout. Broncos win the coin flip and Tebow hits a crosser... game over.
What a shit ending. I mean, if we want the best teams to advance and the Super Bowl winner to reflect insofar as matchups matter, the best team in the NFL, then changes are needed.
It's like the difference in a horror movie between a shitty jump scare and truly scary shit like Alien, The Exorcist, or the Ring or the Grudge (Japanese versions) that have truly frightening images and moments that can haunt you for decades after...
I've yet to hear a fan complain beyond wanting their team to win if they lose a back and forth in overtime unless there was an obvious blown call by the refs (or in rare cases, the OC/DC/playcaller)
I'm not really trying to convince anyone as I know many of us have strong opinions on this, but unlike some rule changes, I think this one will help the game overall and will not often be a thing we talk about.