<i>only rav miller zatzal felt that this was a policy worth making an issue over even if it meant losing clout, funding</i>
That is not true at all. Read some of the Jewish Observers articles on this issue. Particularly abortion.
Both of the predictions made back then came true
(1)that abortion would be more acceptable by frum people even in cases that are not life and death. Ditto for many other liberal anti-Torah ideas
(2)the pro-abortion crowd would not stop there and move on to things like infanticide and euthanasia
Even though those things were unquestionably wrong back then to supporters of abortion