I don't know if I should even admit it, but I guess that I am going to, a long time ago I went to college on the GI bill and ended up with a BA in English with a minor in History. At the time I walked across the stage and got my diploma, I knew an awful lot about grammar and punctuation. At one time my plan was to teach either English or History. But life took over and I went a different direction. At this stage of my life, if you asked me to diagram a sentence I'm sure that I couldn't do it. My wife, who was at one time a technical writer accuses me of misusing comas, of totally ignoring the use of the semicolon, and tries to rewrite my blogs. She tells me that I can't even make a paragraph. I certainly can't spell.
Everything I ever knew about the proper use of English is gone at this point. The reason is that in the many years since I got my degree, it has never been important that my punctuation or my grammar be perfect. In fact, for the whole twenty nine years that I was a police officer, I dictated all my reports and a record clerk typed them out. And I am none the worse off because of that.
I see much of science in the same light. At one time I was a whiz in algebra. I've never used algebra. I loved geometry in school. It does come in a little handy some times, but much of the geometry that does not deal with figuring out the slope of a roof, squaring up a deck, or plotting a course, is long gone from lack of use. Trig and calculus, you gotta be kidding me. I forgot them the day after the final. Physics has come in handy at times though. There is a lot of physics involved in getting a Jeep unstuck, but don't ask me to tell you which principles I'm using to do it.
My point is this, the total and complete knowledge of everything there is to know does not have any value unless you are using it. The ability to diagram a sentence, has no value to me. The ability to do a simple equation has no value to me. The knowledge that the earth circles the sun or how many planets there are and their names has no value to me. Yet people are always throwing out their knowledge of such things as a measure of their intelligence. To me, I consider it an obsession with the insignificant.