True, teams who went for it on 4th down vs NE were only 8 of 23 and NE was not even the best on 4th down stops. I think there is a time to gamble and a time to play it safe. There are some NFL defense who will make you pay for taking stupid chances and then capitalize on those stops. There is a reason NFL coaches do not go for it all the time on 4th down.
I'm not necessarily in on what this guy is selling. I do think it's really interesting, though. In your own example, 8 of 23 means they got 8 additional possessions agains that NE defense. In order to get them, they had to give up the yardage for 17 (< lol, 15, derp) punts, assuming no muffs or blocks. Netting ~40 yards/punt, that's, what, ~650 or so yards of field position. And you're also eliminating the risk of a big play on the 23 ST plays you'd otherwise have.
Personally, that's not enough to make it worth it to me, but it's not altogether crazy. Maybe you only go for it most of the time and eliminate some of the lowest probability plays from the metrics. Or maybe things look different when you don't use the Superbowl champion for the baseline. Either way, though, you have to admit, it'd be fun to watch. If you're a Bucs fan or a Jags fan or a new team in LA, maybe, it'd be worth the experiment. I think it'd be great for the game.