The irony, of course, is that in the end, Utilitarianism just doesn’t work, as it violates the laws of nature.
You always reap what you sow, in its season. Everything reproduces after its kind.
Or what woman, if she has ten silver coins and loses one coin, does not light a lamp and sweep the house and search carefully until she finds it? When she has found it, she calls together her friends and neighbors, saying, Rejoice with me, for I have found the coin which I had lost! In the same way, I tell you, there is joy in the presence of the angels of God over one sinner who repents.
Luke 15:4-10I think it is a safe bet to save those 20+ weeks and older. And then 19 weeks, and then 18 weeks, and on until all the unborn are protected at conception.
We can be joyous at saving those we can now and continue to work to save the rest.
Your reasoning is like that of a man upon dropping a $5 bill in a porta-john throws his Rolex in the hole too because it isn't good enough to reach in the muck over just $5.