Isn't she saying in the very same post you are replying to, that she never took hormonal birth control in her life?
Nature and evolution has no purpose of every single human in mind, as it has no mind. Evolution did not end, it still keeps spitting out a range of reproductive and parental behaviours, some of them turned out to be viable, some not (like exceptionally aggressive women, who kill their babies for screaming like hell tirelessly) and some are half-way, like just not liking babies, but not harming or neglecting them.
On a slightly different topic, I don't want to invoke ABO shit that is only valid for caged wolves anyway and even less for humans, but some wolves in a pack never reproduce. Yes they can go their own way and find a partner, but that would mean being a lone wolf for some time, so they don't leave. If they try anyway, the cubs get killed (by some other female), and that's a good thing, because they are likely inbred.
(In humans, sacrificing one's reproduction entirely just to belong somewhere is well documented in the tranny theads). The point of this is, that in some species, not all individuals reproduce, not all want to, and still the species works.