You are using one particular "definition" of the phrase common sense. It does appear when I search as well. But so do others.

    knowledge, judgement, and taste which is more or less universal and which is held more or less without reflection or argument. As such, it is often considered to represent the basic level of sound practical judgement or knowledge of basic facts that any adult human being ought to possess. 

Now with that definition some of what you said very definitely would no longer be the case as the above definition would seem to automatically "adjust with the times" so to speak in that what we might expect most adults to know and understand changes over the years, decades and definitely centuries.