He or she is "arch pro-choice." But, you would be happy with it being mandatory.
Your roommate uses a euphemism ("choice") to distance himself or herself from his or her support for the right to have an abortion. Most people who support a right to do something just say they are pro-that-right, not that they are pro-choice regarding that right. Pro-gun and pro-abortion mean pro-choice with regard to people owning guns, and pro-choice with regard to people having abortions. But only those who are pro-abortion feel like they need to use a euphemism for their right, because they know something is actually morally wrong with their position. But, you claim to be comfortable enough to make it mandatory.
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