What we call "common sense" has to be taught. It may be common but it isn't automatic.
It may be common to us but it is a complete unknown to many it seems.
I have a good acquaintance that is a rancher. He and his son work like sled dogs from early in the morning until late. He came by today and we got into a short conversation about the things we discuss here. I told him that people like he and his son are as scarce as unicorns.