The desire to prevent abortions is coupled with the equally strong desire to control women.
Having been raised Catholic for the first several decades of my life, I finally came to the conclusion that the Catholic church values women if we are (1) fetuses, (2) pregnant, or (3) providing free or cheap services to the church.
The ban against contraception, if actually followed, would fill the pews... for a time. But many, like me, will become alienated by the misogyny and abuse and coverups and denigration of victims and RICO-like behavior to protect the organization.
It took me to long to leave the RCC; too long. But I am very happy in the creedal, liturgical alternative I chose.
From watching the Catholic Church's actions over the past few decades, I've come to the conclusion that their actions don't reflect any general desire to prevent abortion or a general valuing of fetuses.
I mean, aside from the obvious stuff to prevent unwanted pregnancy that they actively oppose - e.g. contraception - they usually just don't do anything to prevent abortion.
For instance, a few years ago here, government parental leave benefits got expanded significantly. One might have expected some sort of statement from the Catholic Church in Canada to say
"yes, giving pregnant women more paid, job-protected leave directly addresses a number of reasons why women seek out abortions, so we support this measure as a way to reduce abortion." If they were really gung-ho, they could have said
"this legislation doesn't go far enough. The government needs to do more."
... but they didn't do either of these things. They just kept quiet.
The Catholic Church only acts to prevent abortions when doing so involves some measure of cruelty, shame, or other cost for a pregnant person.