Certainly, but loss-of-autonomy has a cost associated with it, in my utility ordering, at any rate. I think it's best to allow people to do what they want with their bodies. Creating incentives is far less intrusive, in terms of personal freedom, than forcing a single course of action on everyone. Besides which, leaving aside the provisional issue at hand, I don't like to think too hard about the legal implications of deciding that people don't own their bodies and brains.