I think the best way to think about grind, is to imagine "time spent grinding" as a scarce resource.
Your kid only has a very limited amount of it to spend; trying to make them grind more than that amount will be absolutely counter-productive and reduce grind "efficiency" to zero.
Which is exactly what schools do: they try to cram as much working, studying and focusing in a kid's daily life as they can, long past the point of diminishing returns; because they assume that a kid's attention is infinitely extensible, and they do very little to actually get their interest.
When you can order a kid to get into a room at set times and to look at a set piece of text and to listen to a single person for arbitrary amounts of times, there's very little to stop you from making every single day a grind a calling it a job well done.
The main benefit of homeschooling is that, if a kid isn't engaged by the teaching materials, you can see it immediately because they'll say so and ask to do something else.
Your kid only has a very limited amount of it to spend; trying to make them grind more than that amount will be absolutely counter-productive and reduce grind "efficiency" to zero.
Which is exactly what schools do: they try to cram as much working, studying and focusing in a kid's daily life as they can, long past the point of diminishing returns; because they assume that a kid's attention is infinitely extensible, and they do very little to actually get their interest.
When you can order a kid to get into a room at set times and to look at a set piece of text and to listen to a single person for arbitrary amounts of times, there's very little to stop you from making every single day a grind a calling it a job well done.
The main benefit of homeschooling is that, if a kid isn't engaged by the teaching materials, you can see it immediately because they'll say so and ask to do something else.