Maybe "it's just wrong" or "I'm a feminist" doesn't move you.
But perhaps disenfranchisement of people who, on the whole, tend to vote similarly, does.
In that case, here's another point I had not thought of:
"Denying the validity of midwife-signed birth certificates could be used to disenfranchise hundreds of thousands of Black people in the South if voter ID laws are enacted."
They've got a point.
(In fact, I'd say it's a much more likely "next up" guess than AngryWhiteFemale's prediction. Not that her guess couldn't happen. But I wager the disenfranchisement of large swaths of people whose parents couldn't get hospital births would come first.)