Choosing not to kill a fetus != saving someone else's life
Using the two interchangeably is like building a house on top of sand
Just as you have the right to defend your home with lethal force, you also have the right to evict by lethal force a fetus.
I don't think it does us any good to shy aways from the uncomfortable aspects of t he free exercise of these rights.
Ideally, people would successfully use other means of contraception and they VAST majority of the time they do. But there are myriad reasons someone may come to the decision that they cannot carry a child to term. I firmly believe that being compelled to do so violates security in one’s person. There’s a long tradition in English common law preceding the US constitution that holds basic the same concept to be true. Historically common law allowed abortion up to the “quickening”, which today we might call viability even though it differs a bit.
Fundamentally I don’t think the state should be able to tell you what to do with your own body. Many important rights flow naturally from this basic premise. I think this is a principled approach rather than working backwards from an outcome.
Obviously there are alternative options to safely get the starving child in your house help. You can easily call the police, CPS, etc to take care of it with no danger to your own body.
You cannot do the same with a fetus inside your body.
Moreover, there are a lot of places where we morally and legally permit people to kill, that doesn't mean that we like killing or condone it in general.
I think I remember the UN Charter on the Rights of the Child stating that (1) children are not the property of their parents and (2) parents have a responsibility for its well-being.
https://treaties.un.org/doc/Treaties/1990/09/19900902%2003-1...
A couple of comments on this:
1. The Convention document doesn't expressly address it, but instructs in several places that the rights enumerated exist for children 'from birth', implying they do not apply to a potential child before it's born.
2. The United States is a signatory, but did not ratify this, and is not subject to it.
I don't think that's the argument the earlier post is making. They are arguing that you cannot be compelled to do something to save some else's life even if it won't harm you, and doubly so without due process.
However, I think viewing someone's body as their own property is a better way to frame this. If you decide a fetus is trespassing in your body, where should the state intervene? The state couldn't force you to harbor someone in your home during a winter storm, even if you left your door unlocked and kicking them out would surely result in them freezing to death. If you believe that a fetus has adverse rights against the body it's growing inside of, then you need to make that case.