Promoting a culture of life is different from using the state to take away liberty
The abortion bans are a solution in search of a problem.
But it's a surefire culture war pressure point, and that seems to be what matters most to many politicians today, unfortunately.
I think quite a few do think it's murder, they just can't really say it because it's political suicide. I don't think it's necessarily them not believe it's murder, but they just think the end (ban abortion) justifies the means(compromising by not punishing the women and allowing rape exceptions)