No. You've proven what we all know and that shouldn't need proof: The Patriots is a damn good team.
Im pretty sure i've proven that the AFC east doesn't suck multiple times
Coincidentally the AFC east is also the best of all 4 AFC divisions this year
That doesn't change the fact that the division is the easiest in the NFL. And on the spirit of what you linked, it's easy to consider the division good and have all those "non-division" games as a proof, when one of the team is the Patriots.
I took the time to gather the data from the past 10 years (2007 - 2016) on all the OTHER teams in the division.
If what you say is true, that the division is the strongest, then it follows that, if we remove the Patriots from it, it would still be a really good division, right?
Well, in the 300 non-divisional games that the Dolphins, the Bills and the Jets played from 2006 to 2017, they combined for 137 wins and 163 losses. That's 0.456, and it would be good for the second worst division in the chart you pulled.
Also, saying the AFC East is the best AFC division this year doesn't mean anything. The AFC is completely thrash this year, other than Steelers, Patriots and Jaguars.
The "BEST" division, AFC East, without the Patriots, is a meager 0.481, nothing to write home about. Sure, better than the 0.428 of the North (dragged by the winless Browns - without the Browns, the AFC North is 0.560) and the 0.441 of South and West, but that's not good.
What you fail to understand is that nobody is underestimating how good the Patriots are. They are a darn good team. The thing is that it's easier to have as many SBs as you have when the division is this walk in the park, and you pretty much have a guaranteed spot on the playoffs every year.