A pregnant woman has the same rights to privacy, to bodily integrity, and to make her own informed, autonomous health care decisions as any competent individual, consistent with the legal framework of that jurisdiction.
So why do they need a statement that analyses these rights and when they will or will not be respected?

A situation where a pregnant woman chooses not to follow advice might be distressing or challenging to a doctor. For example, where a woman chooses not to undergo a recommended Caesarean Section for either maternal or fetal indications. In these situations, the doctor should explore the woman’s reasons for acting against medical advice with her.
Yes, during my labour when I rejected the advice to have a probe screwed into my baby's head (when the conditions did not indicate it was necessary), 4 separate doctors came into 'explore' my reasons. They didn't actually give me any evidence for why it was necessary, just asked why I wouldn't do it and said it would be easier for them if it was done. When I still refused, it must have been to hard for them to follow #10

If a pregnant woman’s decision-making capacity is in doubt, the doctor should ensure that she is assessed as soon as possible. If a pregnant woman is considered to lack decision-making capacity, referral through the appropriate Guardianship mechanism should be initiated.
And so they just decided to do it anyway.

This position statement means nothing unless a HCP actually believe in a person's right to autonomy.