"girls who reach puberty are in much less danger of being traded off to men old enough to be their fathers"
Then you said
The fact seems to be that the creepy cultists only rape post-pubescent but under age girls.
Your second statement is more accurate and contradicts your first statement.
Once a child “reaches puberty” - first menses for a girl - she can be said to be “post-pubescent.”
The statements are clear. They are not contradictory.