In this case I could see your point. However, in basic protection mode as a mother I don't see it. The Amish may be naive but I have not doubt they have the same instincts to protect children as anyone else.
I don't think there is any debate about their instincts to protect. It is just at the scene the teachers apparently the best way to protect them was to follow instructions and seek help for them once outside. I don't disagree with their decision (though I don't really think it is even fair to call it a "decision").
I think you are just making too many assumptions here about the women in that community and casting the teacher in a very unfair light.