With some, although they won’t come out and say it, they dislike losing the power to have Ooops pregnancies.
That's it. But you're missing an even bigger point, one which gives the whole game away.
Abortion, they say, is all about the right of a sloot woman to control what she does with her own body. Who in Hell do these Whores think they are, presuming to tell a MAN what he can do with HIS own body?
(The answer is *your* point. Without discreet, known-only-to-the-woman contraception, and the risk of "oops" pregnancies to give her power to compel his commitment (and abortion as a backdrop should that fail), it would be clear to EVERYONE that they're just being used!)