> It's common to say that the "pro-life vs. pro-choice" debate is all about whether the foetus is a person of not, but that's a misdirect.
I would say exact opposite. It is the key question, because if there is no fetus-person claim, the whole issue is moot as there is no entity to which pregnant person has moral responsibility.
But if we assume a fetus is a person with all personal rights, it is just clash of rights and freedoms of two persons, which may turn out both ways based on relative valuations of these rights in a society. Personal autonomy is a strong card, but there are many cases where it is restricted to protect life of others (involuntary treatment of mentally ill or forced isolation of infected).
Also, the case is stronger as (with the exception of rape) parents are mostly responsible for conception of child. One can say that it was not their decision and contraceptions can fail, but the same can be said for car accidents.
OTOH, the fetus-person position is here only because it is a forced religious idea on secular society. So it is much more clear-cut to just reject fetus-person proposition on secular grounds. (We already did something similar for braindead cases that are biologically alive.) Without that 'pro-life' position has no standing. By abandoning fetus-person debate and making the debate about personal autonomy, the 'pro-choice' side just unnecessary weakened their case.