I can't and won't try to dictate to an entire political party what they should do. I'll just note that, if the upcoming Dobbs decision does come out in favor of upholding the law and overturning Roe, then there is likely going to be an increase in the amount of competition between pro-choice and pro-life Republicans in the primary elections in many states in the coming years/decades. I can think of two reasons why pro-choice Republican voters have mostly kept quiet and inactive for the past 30 years or so, trying to not make waves about their views on the abortion issue.
1) They have believed Roe was pretty much so sacrosanct that it would never be overturned. When Anthony Kennedy and David Souter were appointed between 30 and 35 years ago, they might have inclined to overturn Roe, but they both ended up deciding, in 1992, not to overturn it (PP v. Casey), and maybe pro-choice Republican voters still cling to the prospect that it is not going to be overturned this year either, as maybe Roberts and either Gorsuch or Kavanaugh will decide to do the same thing that Kennedy and Souter did in 1992.
2) They disagree with the Court's interpretation of the Constitution in Roe and Casey and they do think the issue of abortion should be returned to the states. They are waiting for that to happen, and once it does, then their votes in GOP primaries will be more important.
With either of those two perspectives, pro-choice Republican voters will likely become more political energized when/if the Dobbs decision overturns Roe and returns the issue of abortion to the states. I think a majority of Republican politicians will still remain pro-life in the coming years, but the party will become increasingly divided about the issue, like they used to be.
Maybe if orthodoxy was opened up a bit, I would feel more free to exercise my right to vote rather than simply giving my vote to a party that has been struggling to inspire confidence. Then again, maybe if Dobbs overturns Roe, it would get Democrats to start taking politics seriously again. Silver linings. Or not.