Well, we can consider that the status of "motherhood" is holy and that the innocence of the newly born is also holy, while also acknowledging that those receiving such "blessings" can still be damned. In both cases, it's not as an "Achievement Unlock" or something, that automatically places on in "blessed status." It's a holy action/status, but those in service to the holy are not immune to other sin, or the capriciousness of the Hundred.
The kicker about Eärwa is that it is a fundamentally sexist place. That is because the literal fundiment, the Cubit, is sexist. There is a "divine" ontological order that proceeds from that, which places women in a "lower" status than men. People are apt to question why Bakker would do this, while not questioning why nearly every "civilized" society in the human history has done the same. Bakker does it to highlight how stupid and fucked up it is to imagine that value should be ordered by some remote, inhuman, arbitrary thing. Questioning why the Cubit is sexist really doesn't provide any answers. The point is more to ask, not "Why this Cubit?" but rather, "why any Cubit at all?"