Young children walking around pregnant isn't evidence in your world.
Give us a link, Please..
I live in Portland, OR. I see it everyday on my way to work. But I don't see the police raiding every pregnant 14 year old house and taking other children out of the home.
And apparently it was not enough for law enforcement either because THAT WAS NOT the probable cause they used to invade the compound. They used an unknown tipster accusing a man that does not live there or anywhere else in TX.
If they believed crimes where being committed they should certainly investigate, but using the tactic they did the police may well lose the ability to present any evidence since it all stems from this “Phone call”. Fruits of the poisonous vine and all.