I do indeed see the Philosophical difference. Here’s a different take.
Here on FR a number of people believe birth control pills kill the unborn and are essentially no different than an abortion. If you believe it is “murder” and you find out that a neighbor is using the bill, is it okay to go into their house uninvited, sit on their bed, and try to talk them out of it?
But that's as much as I'd want to say about this hypothetical example.
If I were a pharmacist, it would be a violation of my professional and ethical judgment to sell indisputably lethal pills, and I woldn't do so. So there's another approach.
It is reasonable to think that a little last-minute coversation could persuade a woman in an abortionist's waiting room to decide not to kill he baby. Eleventh-hour turn-arounds like this, even after the at-risk mom is actually in the procedure room, happen more often that you might suppose, including women already prepped and in the lithotomy position getting up off the table and saying "I changed my mind."
I read about this happening just days ago: the boyfriend went into the clinic and persuaded the girl to spare their baby.
So I think going into a clinic and offering kind and earnest words, would be more reasonable than any of the hypotheticals offered by you and others on this thread.
Reasonable chance of success would a morally relevant factor.