Board Thread:Suggestions forum/@comment-26897694-20170722063047/@comment-26553378-20170727161645

watermills, windmills, treadmills, and horse powered mills would all make more sense than a lever for powering a millstone, even a simple hand crank such as that which is found in AE2.

...and while breaking balances it, it doesn't really make much sense, I mean it is really just some gears rotating with nothing in them.