SB1 is not truly pro-life or pro-choice in its wording. While the intent was obviously pro-life, the bill itself really is not. It requires abortion clinics to upgrade their facilities and services and bans abortions after 20 weeks, no more. It does not actively shut down clinics nor does it truly infringe upon a woman's ability to get an abortion. Many clinics that would get shut down right now have over a year to comply with the bill, ample time to gather the money to upgrade.
Additionally, the rules set down are by no means new. Europe, which is often hailed as more liberal and progressive than America, has restrictions that are often even more restrictive than SB1's. In many countries in Europe, abortions must be performed in hospital grade clinics and abortions are banned after 15 or even 10 weeks.
Thus, at its core, SB1 is not truly pro-life or anti-abortion. It is merely an exercise in the state's right to limit and control abortion, per the guidelines established in Roe vs. Wade.