Seems to me like you've kinda cherry picked scribes. Among other reasons why that doesn't really apply here, could be pointed out that scribes as a profession evaporated HUNDREDS (thousands?) of years ago, so I hardly see the direct analogy to modern life. There are plenty of examples that are more relevant.
Take metal working. Or, coal mining. Post-industrial revolution during the "boom" of the early 1900s, metal working was seen as the end-all of careers. Everyone needed to "learn to work metal!". In fact, it was pushed so much as the best career, that it became integrated into the educational system (shop). It was believed that everyone needed to learn to work with metal.
What has that done for the industry? Honestly, can you look at the metal working industry, or the coal industry, and tell me that they (or us?) are better off because of it being integrated into our educational system. We could probably argue all day about whether or not that was a smart move for mankind, but one thing is for sure - all those people ended up with depressed wages as two effects took hold - over supply of workers locally, and cheap labor abroad.
Similarly, I think we can debate all day about whether or not everyone knowing how to code is going to be a good thing. I don't think I have the same perspective as you on that, but neither of us can really make a definitive statement of fact. We can probably both agree however, that software faces the same destiny as other professions which went through the very same life cycle.