You are left wondering why the First Nations parents don't care about their child's education. But that is just perception. The reality is that the parents are doing what they have learned from their culture. They are obeying a cultural rule. First Nations parents are strongly influenced by the principle of guidance without interference.
Children are responsible for their own learning by watching and absorbing what they see.
I remember at the age of 15 wanting to learn how to drive a car. I asked my father to teach me. He handed me the keys and said the car was outside. My father thought I should have learned how to drive by observation. He had modelled for me many times how to drive a car.