You still don't get it. Nobody is saying that farming is not hard work or that it's even less hard work than the hunter/gatherer. Bone gets more dense from specific physical activity and not from all, for example running (which hunters do more than farmers) gives denser bone than walking (which farmers do more) and that is even if you walk for hours upon hours carrying heavy equipment vs running just a few hours.
What you also obviously miss completely is that it's a well established fact that the bones got less dense when man begun to farm those 12000 years ago, it's measured objective facts, not just logical deductions.
To make another analogy, if you weight train in a way that exposes your bones with compression power like squats and deadlifts then you also get denser bone than the pecs and biceps boy next to you that performed two bazillion sets to failure and thus exercises a hell of a lot more than you did.
Here in Sweden we have different papers for each party, that is instead of crossing of a name you put a whole paper for party x into an envelope. Pro is that this makes the counting much easier and also is not complicated for the voter. Con is that it's very expensive for a new/small party to print and distribute papers to all voting places (if you get over 1% in an election then the state will pay and manage the distribution). You can also write the party name on a black piece of paper if you want to (or if the party you want to vote for doesn't have papers in your voting place) which of course negates the pro but it's rare enough to not make a real impact.
If there's a yes/no vote done then each such vote gets their own envelope and there is a yes or no paper to choose from, so no crossing their either.
The flow chart is a most thoroughly oversold piece of program documentation. -- Frederick Brooks, "The Mythical Man Month"