I’m not avoiding anything, and I’m not assigning rights. I’m evaluating arguments. FWIW, if you read my OP, you’ll see I end up on the pro choice side.
But, let me try to answer your question anyway:
I don’t think the argument makes any kind of sense. In order for the argument to make sense you must value control over one’s body higher than you value human life in general (assuming you grant the premise that an unborn child is a person, of course.)
Why? What value allows for this? A body is just a bag of meat. What makes it special? The only thing I can come up with is that your body is special because it belongs to you. It is your property, and most feel that you have a right to access and use your property. In a way that you see fit.
So a holder of this stance values property rights higher than it values human life.
This is an unusual stance. We place all kinds of controls on the use of property, including bodies. For example, you just can’t throw a stowaway overboard. You are not allowed to murder yourself, etc. you can be put in prison and use of your body restricted by restraints, etc. etc.
So, what does the fact that one body is inside of another body have to do with anything? What makes a body in a special category outside of other property? What makes pregnancy an even more special circumstance, that disallows restrictions on the use of your body when said use may be restricted for what appear to be lesser reasons?
Perhaps there is something intrinsic in this argument over a right to control one’s body that I am missing. If so, I suspect that it is that you consider someone’s Body to be their ‘person.” That is supposedly some special category of property.
If it’s so special than why does society not resist imposing restrictions upon it as outlined above? Why is pregnancy exempted as special form restrictions, particularly the one against the taking of another life?
You see, when you say a fetus can’t make use of somebody else’s body for survival you have not made a complete consistent argument (unless you are placing property rights above sanctity of life in general) are you doing so?
People sometimes try to argue around this problem by saying something like “nobody forces you to give a kidney transplant” or such this is true.
Similarly you generally can’t be forced to take somebody as a passenger on your boat, or as a tenant in your home. Once they are there though the situation changes. They have something like squatter’s rights, and you just can’t kill them because they are where they aren’t supposed to be, making use of a resource that isn’t theirs.
A fetus is even more blameless than most stowaways or squatters. These latter usually had to take such action or make some choice to end up where they aren;t supposed to be. A fetus has no such choice and is blameless for its trespass.
I haven’t figured out a way where any sort of reasonably acceptable and agreeable value system consistently allows an abortion under bodily sovereignty criteria without creating all kinds of other situations where killing of people that are violating property rights also would not apply.
So, not only is the argument incomplete, when it is examined it tends to look like an obvious nonstarter.
The fact that it doesn’t make sense to me and I can’t make it work logically and consistently doesn’t mean it can’t be done. Perhaps it is obvious to you. If so, i’d Love to hear it.