How is it abortive when there is no chance of fertilization? How about a woman who is abstaining from sex who takes the pill?
If an egg does not become fertilized, how can there be an abortion?
Any use of the Pill is cooperation in the evil of providing the Pill to society at large. A consistent person would not wish to entangle themselves with a device whoe normal use they oppose. You might not be aborting anyone yourself, but by helping make the use of the pill very widespread and acceptable, you indirectly are.
The PURPOSE of the pill is to abortive. If it doesn't obtain its purpose, it's still an abortive.
That's like saying the abortion pill is not an abortion pill until is aborts. Until then it's just 'a pill'. It has a purpose, sold for that purpose and the money gained from it goes to line the pockets of those support this purpose.