You can only advocate for it at a personal one to one level and to be fair those who do (and it's been some time, so I don't know what your position is) tend to be disengaged from any mass pro-life movement, not necessarily just because it's politicised but because the movement doesn't have a workable goal.
This is pretty much exactly what my position is at this point. I retained some hope for political action against abortion as such until quite recently, but when the pro-life press resorted to outright lies about the content of the new abortion law in New York, a state with whose politics I'm quite familiar and in whose politics I'm quite invested, I decided I'd just had it. (Two of my closest friends are New York Democrats, one of them staunchly pro-choice; no matter how strong my philosophical disagreements with this friend, seeing New York Democrats characterized as evil demon monsters who wanted to see babies die didn't exactly endear me to my pro-life conspecifics.)
Which I accept is clearly still 'pro-choice' but less rooted in HARD SCIENCE which I think both sides are too eager to invoke.
Absolutely no argument there.
