There is a false dichotomy in your post. You dont have to be either this or that. You can be both, and have different shades.
I will never forget one guy asking "why are you interested in helping rape victims when there are others who need more help, are you a perv?". This same question was asked in real life, also in this very forum. Well, it seems like saying "I have a mother, and three sisters, so I have a particular affinity to this particular cause" has no effect. Because this type of question has that black or white type of false dilemma inbuilt.
Its absolutely unfair to do that. There are some people who may have an particular cause in their minds and souls. There maybe others who have other causes in their minds and souls.
I don't think your comparison works.
For one thing, the anti-choice movement is, well, a movement of many people, not a single person like in your analogy.
Yes, no one person who's passionate about the issue of sexual assault will operate a shelter for domestic abuse victims, represent assault victims pro bono, AND lobby to improve the laws around sexual assault, but
in the movement as a whole, we see all these things. In general, if some situation
Likewise, in a movement that were actually about "protecting life," we would expect to see a diversity of ways that this is expressed. It wouldn't just be about abortion.
The second issue is that even if we assume that the anti-choice movement is specifically focused on abortion or fetuses, its behaviour still doesn't make sense.
The mainstream anti-choice movement seems to have no interest in preventing abortions by any means that make a pregnant person happier or better off.
For instance, we recently expanded paid pregnancy and parental leave here in Canada. This directly addresses several of the major reasons why people get abortions, but none of the anti-choice groups in this country said anything in support of the measure. They also haven't campaigned to improve this system further (since pregnancy and parental leave for self-employed people is still an issue).
I can't count how many times I've heard about anti-choicers picketing abortion clinics and hospitals, but do you know how many times I've heard about one of the picketers offering money to pregnant people going in if they choose not to go through with the abortion? Exactly once (in the Netherlands, IIRC).
The actions of the anti-choice movement don't make sense if we assume they're motivated by "protecting life" generally. They don't even make sense if we assume that they're specifically focusing on fetuses, or even if we assume they've narrowly focused just on the issue of abortion.
OTOH, if we assume that the anti-choice movement is motivated by a desire to punish pregnant people for having sex they don't approve of... well, everything they do can be reconciled with that.
If you disagree, I invite you to tell me one way that the mainstream anti-choice movement tries to prevent abortions that has the effect of making a pregnant person happier or better off.