> This seems very biased to me since it's often that both parents make career sacrifices, not just one.
With adoption, maybe, but carrying and bearing a child has a life-altering impact on a woman's body. It's not like you can give birth and go back to the office on Monday. It takes months to recover and even after that you likely won't be at full performance like you were before the pregnancy. Common side effects like post partum depression can easily linger for years if not given time and treatment. Quality of life is also quite terrible for the last while before giving birth, not just because of changes in physical size but also the lack of sleep and what a mental impact that could easily be described as mental illness if it wouldn't coincide with pregnancy.
As a man, I seriously don't know how women do it, and how many even do it multiple times.
The notion that two people make equal sacrifices when they have a child is laughable. Of course, in a healthy relationship both parties make sacrifices, but it's impossible to equate the sacrifices they make. Perhaps it's technically possible if two women both decide to give birth from a donor father, one after the other or at the same time, abut that's absurdly rare.