Well yes, but owning a home is artificial, but breeding is primal. Are child-free people consciously overriding their primal urges (and social pressure), or do some people simply not have those urges while others do?

The "women have always made efforts to avoid pregnancy" argument isn't necessarily a convincing one, either. While a woman may want to not get pregnant *now* or *by this particular partner*, that's not proof that she won't want to breed at some point in the future.