This “lesson” is in spite of [or because of] the “you have to be carefully taught” piece. Analogies, like fables, are simple touchstones for day-to-day living — a simple compass that tells you the direction in which you are heading; and [sometimes] how to get back. It’s up to you to look out for the cliff.
I once saw an old milk bottle decorated with the Quote: “There is hardly anything in the world that some man cannot make a little worse and sell a little cheaper, and the people who consider price only are this man’s lawful prey.” — John Ruskin.
It was a fired-on design. The milk was probably better for your longevity too.