The social context has nothing to do with it, that's just a way to say that if enough people say that you can't do to yourself what you want to that that makes them right, which has historically led to all kinds of wrongs. See also: the right to euthanasia, abortion, being gay and so on and so on. It's always the sanctimonious groups that are hell bent on telling others how to live, but it never was any of their business.
How 'we as society' view this has no bearing on something that is ultimately the domain of a single individual, the person affected.
In the United States this is codified by "The right of the people to be secure in their persons" though of course there is plenty of hairsplitting going on about what that actually means, even though the simplest reading is to take it for what it says.
The implications of this are far reaching (for instance: I'm on the one side against a vaccine mandate because it would infringe on that right, on the other I think that a lot of people have allowed themselves to be pushed towards this on a pretext).