> I'm not pointing out folks with disabilities. I'm talking about perfectly healthy adults who seem to have no sense of awareness around them.

Careful. It's easy to overlook disabilities that may not be immediately externally visible.

I have a friend who's heavily dyslexic. You'd never know it if you ran into her on the street; she's quite successful in her career. Yet she uses voice dictation when sending text messages because it's an order of magnitude less time and cognitive effort for her to write something out that way.

I tend to think the world would be a better place if we were all just a little bit less judgemental of things we see others doing that we can't immediately explain.