Learning of (keyword of) concepts and ideas is fun but the reason schools exist is because most learning is a grind. Learning to draw well, learning a language, learning an instrument, and even learning math and logic require going through the grind of learning and repetition. The grind is only harder if you don't have a good book or teacher because the practice you do could potentially be actively harmful (or useles…
I think the question is how much of the grind is necessary. When our oldest kids were very little, we would work on the alphabet and numbers and track milestones carefully. At some point we realized that we could either grind hard at stuff they just didn't quite get, or we could wait a few months until they were older and just tell them stuff and they'd remember it. And obviously it wasn't quite that easy, but it fel…
It's the same principle as learning touch-typing with the keyboard layout visible on a card in your field of view (not the same as looking down at the keyboard, which I agree is a bad habit that slows you down).