I like the points you make. They are similar to the ones David Epstein makes in his "Range".
But what your article made me think was -you can never know what kind of connection your mind might make if you feed it interesting bits of information. And you never know when it might become useful. You just do not know what you do not know.
We must all learn to learn more. even if the knowledge we aquire might seem bit pointless in the beginning. Its fine. As long as you like and enjoy it.