Why does natiri's mother tell jake that the sky people cant learn na'vi ways?

Natiri's mother tells Jake that the Sky People can't learn Na'vi ways because she believes that their culture and values are fundamentally different, rooted in a deep connection to nature and spirituality that the humans lack. She perceives the Sky People as driven by greed and exploitation, making it difficult for them to truly understand or appreciate the Na'vi way of life. This highlights the cultural divide and the inherent challenges of bridging two vastly different worldviews.