"can do as good a job being parents as they can being legislators."
Let me just say that while these women are being legislators someone else is raising their children. So they must not be good legislators because they are slacking in the parent department This may sound harsh but I have been a nanny for seven years and I know that the ones who suffer the most from a working mother are their children.
Do I think it is sinful........not sure.
Making one's children suffer for one's own ambition... yes that's sinful. Were it absolute necessity, no, but that is clearly not applicable to any of the cases in question.
Why, didn't you know? Anyone with 12 credits of early childhood education is better trained to bring up children than birth parents!