Yeah, very clever if you come from a planet which otherwise has planetwide instant communications, and can easily have a central count that goes up by one every time a doctor clicks a button about a newborn baby having its umbilical cord cut after it starts breathing. Keltham wouldn't really blame Golarion on this one.
(He'll go Prestidigitate 'Mirna' and 'husband Gamal' onto the interior of his wrist jacket so he doesn't forget.)
Keltham is planning to help Osirion a lot, enough to let it face down Cheliax, to repair past mistakes he's made and because of a debt he owes to Abadar. He doesn't want to make the world worse, in the course of doing that, and there's also the question of whether he should help Osirion a lot more than that minimum.
Countries like Cheliax and Absalom in Avistan, which underwent a different development history where a lot of men died out in the wars and there was more competition among women for the remaining men, often allow both men and women to have their own incomes and own their own property, as Keltham understands it. Keltham's home planet of dath ilan didn't treat men and women any differently, in this regard, and would have regarded it as a very grave wrong akin to enslaving somebody, to not let them own their own property and hold for themselves what money they had earned, whether they were men, or women, or children old enough to own money. Keltham, when he arrived into Golarion and called out to a god of honesty and fair treatment who turned out to be Abadar, would not have thought that god of fair trading would have countenanced women being treated as Osirion treats them; and a seventh-circle priest of Abadar out of Absalom, who Keltham spoke to, didn't seem to feel much differently.
If Osirion increases in power and spreads its own culture across the world, a culture in which women are - as Keltham's world would see it - halfway enslaved, it is something Keltham would have thought a grave wrong to do to Golarion, in the course of an outsider trying to help it.
It's not nearly as grave a wrong as Cheliax spreading its culture and sending more people to Hell, and Keltham is indebted and obligated to help the non-Evil societies of the world at least enough to stop that whatever the cost.
But if Keltham is to give Osirion more help than that - would she, Mirna, a woman of Osirion, who wasn't allowed by Osirion to follow her own path, if she had to pass judgment on Osirion - what would she tell Keltham should be their fate? Or how would Mirna say that Osirion must change how it will treat her daughters and granddaughters, if Osirion is to be made more great and powerful than this, and given a louder voice in shaping Golarion's Future?