In this specific case, I agree, it’s a hard moral question with the twin involved which makes it harder.
I’m not speaking on this specific case, and most pro-lifers are open to exceptions, this being a prime example of where I think there should be. but the more broad statement that simply because I’m pro-life, means that I want to enslave woman, is absurdly wrong and simply perverting and strawmanning a fairly reasonable argument that a human life in the womb has inherent human life value.