I always thought it would be funny to argue against the religious right that life begins before conception, and conception is a meaningless marker on the way to being a baby just like "viability" was.
As someone who has had a bizarre life so far, I think the argument for self determined reincarnation is a good one—I’m the only entity I know with a sick enough sense of humor to write the conditions of my life, and I have more belief that I exist than in the existence of a sky puppeteer.
I’m a one degree of separation hinge between the White House, a crack house, and a nudist tree house, and I’m not even Hunter Biden. Only I would have done this to me.
Or if you just believe everything is pre-ordained. The argument to the religious right is that if God is omniscient, then He knows which sperm will hit the egg, so 1 second prior to conception is exactly the same as conception in terms of the odds a given sperm or egg becomes a baby. And 1 second prior to that, and 1 second prior to that, all the way back to Adam and Eve.
So even if conception is when the baby is "ensouled" (hundreds of years ago they thought "the quickening" when the mother first felt the baby kick was when it got ensouled so that choice is arbitrary but whatever if it's a religious tenet I don't want to go against it) it's not meaningfully impacting whether or not an ensouled baby is born any more than birth itself is.
It's all shades of gray all the way down, there is no morally "correct" hard line.
After Trump was elected there was a panel discussion with the creators of all the top political TV shows. The West Wing; Veep; Scandal; and all the rest. Every writer said the same thing. If they'd had a character who had said all the things Trump said, the networks and advertisers would have demanded that character be thrown out the next week.