> there is no other situation where we require a person to surrender their body—or even a part of it, , like a redundant organ, or even just their blood—to save or preserve the life of another human.

Both the draft (or any form of compulsory service) and taxes are counter-examples.

You're probably going to object to taxes, but it's reasonably well established that wealth is health. (It's also true that taxes are spent on things that don't save or preserve the life of another human.) More to the point, taxes take my time, which I can't possibly get back.

Interesting enough, so does prison.