I don't see why "canAutomateGrindwheel" should be a config file level option, as it is specifically designed as an extremely low-tech macerator. The benefit of the grindwheel is that you get your ore->dust (ore doubling) as early as possible (even the pulverizer cannot be gottten as quickly, given no anti-luck with quartz), and the tradeoff for that being you have to manually run the thing. Perhaps a config value for the speed at which it grinds, although I think it is already a good deal faster than the macerator so that's just adding more to the unbalance of it. Otherwise, if miscperipherals adds a grindstone crank turtle, hopefully it is configurable to require fuel per crank, and a config to disable it as well.
Sit kid down. Give them a cooke... tell them they will get more if they just keep clicking on the box on the screen.
Don't forget you just need to click and hold. No reason to not just log into a second account (as you have access to one in this consideration) and put a book on the mouse for that computer and leave it running.
Or set up a virtual computer, log in there, and use a mouse autoclicker to lock-click for ∞ seconds, if you want to get fancy with a one-computer solution. Lots of fun ways to game the system if you really want to game it.