That sounds laudable, but our political voting on abortion is several steps removed from any tangible results. In other words, when you compromise on abortion for political purposes, there is no obvious and identifiable cause->effect, IE, not even “one child” clearly saved. I know you believe otherwise, but secular society will look at things like actual abortion rates, etc. Viewed that way, there is no evidence (at least yet) to suggest that a compromise-and-focus-on-Roe approach is effective.
This is quite different from, say, your work volunteering for a maternal crisis hotline or center, where cause and effect is clear and direct.
The one thing that voting does do is make a statement about one’s beliefs and serves as an example to others. In that light, ‘important right to life issues, like abortion, can be compromised’, might not be the best message for combating and correcting a “culture of death”.
In other words, without tangible evidence that a compromise strategy is having any positive effect, perhaps the perception of being hypocritical with regards to the right to life, even in fetal form, that it can create does more harm than good.