(Some) conservative Christians absolutely do not agree with this. Hence abstinence-only education, shuttering planned parenthood, cutting requirements that insurance cover contraceptives and cutting government funding for them (and health services for women more generally), trying to restrict access to Plan B, etc.

For folks trying to make policy on moral absolutist grounds, the outcome (number of abortions, stable healthy families, ..) doesn’t really matter as much as making sure all of the relevant questions have black-and-white legal status in accordance to the extent possible with their religious beliefs.

Trying to get deontologists and consequentialists to agree on policy is difficult partly because they typically don’t understand each-others philosophical frameworks, and talk past each-other, making assumptions (e.g. less abortions = good) which are not valid to the other party.