"1+1=2" is simple. For me, A-A and J-M being ENTP is the same thing as "1+1=2." So yes, for me, it is that painfully obvious.
Well, I can agree that you might see it as painfully obvious, but you should just as easily be able to see that it might not be the same for everyone -- hence, it's subjective and rationally to make a blanket judgment like "it's painfully obvious" seems naive.
For a similar example, many people being in "painfully obvious things" that can't be shown to be true (such as various religious beliefs -- people argue vehemently about beliefs they consider to be "painfully obvious" --"You can't have babies if you're gay, so being gay isn't as good as being straight nor is it what nature/God wanted", common sense; or "The world is so complex and love wouldn't exist if not for God, how else would people get here?", common sense, etc.) And centuries ago, many would have said it was painfully obvious that the world was flat, using their common sense; after all, it looked flat, and if you went in a direction, you just kept going. They just didn't understand how big the world was.
"Looking behind things" does not encapsulate the totality of iNtuition. "Looking behind things" is only applicable to Ni and speaks nothing about Ne. Ne is "superficial", It merely touches one object lightly and quickly moves on to another. It is "bouncy."
My idea of "common sense" includes sharpness and easy to follow. Ti-Ne-Si is very much "common sensical." It references no other logic system but itself. It is more "common" than any standard of thinking because it is "universal." No context needed. A person from Africa can reach the same conclusions as another person from Russia by using that same very-average "sense" of thinking. This, I introduce to you, is the xNTP logic system.
That's not common sense, by the standard definition of common sense. That's "mathematical logic," if I had to name it -- math is the univeral language, and that's why INTPs traditional think in terms of logic symbollism and structure their ideas and minds that way.
Talk to the common guy down the street, and he doesn't credit the college prof with "common sense." Common sense in the vernacular is stuff that looks so obviously true to the average person (not INTPs, who comprise 3-4% of the population) that you don't even need to use rationality to understand it; you don't need higher learning; you don't need some abstracted angle of thought. While people who know me say I give very good understandable advice, my family and environment would always tell me I had no "common sense" because I kept looking at the bigger picture rather than what worked on a normal daily level.
Are we really arguing about what "common sense" means?
INTPs are not the poster children for "common sense," if you actually do a canvass of a normal distribution of the population.
Anyway, while neither AA nor JenM are "dumb" people, if you look at the arguments they actually use in all their videos, they're all "common sense", rubber meets road, vernacular arguments. They are not the kind of arguments that Descartes, or Machiavelli, or Thomas Edison, or Thomas Jefferson, or whomever else would make in order to "prove a point." In fact, I've seen people here (typically NTs) criticize them for having numerous "logical fallacies" in how they express their views, even if they agree with their conclusions. Does that really sound like an NTP? Not typically. They're more interested in talking "rubber meets road," and in fact they are fine with it, because they think in those terms, they're not even trying to translate it into "common sense."