Right, why should men have to subsidize maternity care? Why should women have to subsidize prostate exams? hint: that's how insurance pools work.
So, the pool of people who are planning to have kids should pay for itself. There are millions of them. The pool of people who are biologically incapable of having kids are at zero risk of incurring that cost, and shouldn't pay for the risk of an occurrence that cannot happen. Women who cannot have children are not in the pool of women who will experience the cost giving birth. Are you foggy on that, somehow?
Sounds like you should have just gone with the "no coverage" option.
But you've just been explaining to me how affordable and reasonable and good it all is. Why the change of heart?