Multiple concerns. It isn't clear cut what the primary reason is at any given point. It is not an exact science.

We recently had a kid over. Didn't eat with us. You kind of have to read the room. He was not very intereted in eating with us.

I dunno, a lot of this article feels like trying to describe in words a color you have seen but the people who write to doesn't know the color. It is a bit of an impossible task as there is no good way to articulate something you instinctively feel.

It is about grasping and understanding a social situation from being part of a culture. Alternatively it is like explaing black humor to somebody who never got exposed to it. A bit weird example, but I often felt South Americans never understood humor in Northern Europe. North and South are culturally divided in so many ways.