> Allowing a child to grow naturally inside his or her mother's body is the natural course of events. Pregnancies terminate naturally at birth.
Kind of. The "natural" course of events you describe depends on the pregnant person to interact differently with society. A pregnant person eats more (and hence has to go out of their way to buy more food), pays more for healthcare products/services, and has to worry about maternity leave. (In the US, employers are mandated to provide only unpaid maternity leave [1].) Working and paying bills while pregnant or not means relying on an unnatural system called the economy within the larger maybe-natural system called society. In other words, carrying a pregnancy to term is not entirely a sequence of natural events. (Meanwhile, after birth the "natural course of events" analogy stops applying, because one plausible natural course of events for a born person is starving to death.) But enough digressing on my part.
[1] https://en.wikipedia.org/wiki/Parental_leave_in_the_United_S...
> murdering your own child and taking away many decades of life from that child to avoid a few months of inconvenience is an unfair trade
The inconvenience of pregnancy is not simply the pregnancy. Even if you ignore maternal mortality (and pregnancies from rape, incest, and bad luck in cases where the pregnant person had used contraceptives correctly), your estimate of many decades of life for the child translates to almost two decades of inconvenience for the caretakers of the child, assuming that the average person doesn't become mostly independent before turning 18. (When I say caretakers, I'm including cases where the born child is sent to foster care or an adopting family, as well as cases where the child gets at least one different caretaker before 18.) Additionally, the less capable the childbearer is of childcare, the more inconvenience the born child will have.
I feel that bodily autonomy for a pregnant person is more than just the convenience or inconvenience for the bearer. I haven't formed a coherent argument about bodily autonomy yet. But especially in matters of bodily autonomy, I don't think everything immoral should be illegal.