All of the byproducts of the Sexual Revolution are centered around power, not objectively.
When the woman decides she wants the baby, it is treated like a baby, and when she decides she doesn’t want the baby, it isn’t treated like a baby. The humanity of the fetus is dependent on the wishes of the mother. This is why the standard term used within Planned Parenthood is ‘PoC’ or ‘Product of Conception’ in order to avoid the word ‘baby’ unless the patient chooses to use it.
Pro-life is an objective worldview where the unborn child is always a human being, independent and irrespective to however it is viewed by the mother or father or anybody else. Pro-choice is a subjective worldview, because the way the unborn child is treated and viewed depends on the wishes of the mother.
There is a parallel in transgenderism. The person becomes male or female or another invented gender based on their subjective desires. The person is given power to supersede reality and replace it with their own.
Peace.