very good philosphy, near the end author says "Think of yourself as a physics teacher, not a physics textbook." Very good. As for appearing surprised that many people do not care, so it is.

Everyone has a relative that after 30 years still doesn't know how to use the airco controls?

I read somewhere it all follows some sort of gaussian/normal distribution, like in 11 peole there might be 1 knowledgeable, 2 interested, 5 pretending to listen, 2 bored, 1 sneaking out. Sometimes it's you or me who sneaks out.