Pine Ridge has unemployment of 80-90%, median income of $4000/year, and life expectancy of ~50 years. Many people live without electricity or running water.
I don't know that people who live there say "I'll never amount to anything", I don't think any of us participating in this conversation live there; probably none of us are natives. So we're not talking about what they say about themselves, we're talking about what we say about them.
If not the legacy of expropriation, displacement, and cultural destruction... the usual explanation is that there is just something wrong with these people as people, something diseased, pathological with their culture. I don't see how that is in any way useful, or somehow more respectful of "agency".
Up until the 70s, children (children!) were still being forcibly sent to prison-like (for real, prison-like) boarding schools.
https://archleague.org/article/cheyenne-river-reservation-bo...
I don't think there is anything wrong with Oglala culture -- I think they have the cultural and personal resources they need to thrive if conditions are changed to make up for generations of intentional targetted destruction of their material resources and cultural life and social networks. "Social justice" would be restoration of sovreignty, reparations (a massive "marshall plan" level of physical and human infrastructure investment), an apology and general cultural recognition and education throughout the USA of native history, legal enforcement of treaty rights that have been ignored/thrown out, etc.
While it's a situation with great differences as well as similarities, New Zealand's reparative policies toward the Maori can provide some models. https://www.justiceinfo.net/en/79224-new-zealand-leads-way-r...
Blaming the Oglala Lakota people for the result of generations of targeted destruction of their way of life and ability to survive is not somehow more respectful of their "agency" or dignity.
Like, what are we actually talking about here right now? The lack of capacity of people on the Pine Ridge reservation to handle a weather emergency? How is it more respectful of agency or dignity to say we shouldn't talk about how this is the result of generations of colonialism, that intentionally removed the material and cultural resources people would use to take care of themselves? Is it more respectful of agency or dignity to suggest that they are the poorest community in the USA because of their own cultural failings? I agree that liberals as well as right-wingers can pathologize native culture, suggest that their culture is broken and needs to be "fixed", that the problem is internal -- I think suggesting that there is something wrong with native culture is what is disrespectful of their actual dignity, agency, and continued ability to survive under conditions designed for the opposite. They are very strong people, the evidence is that they are still there, and I hope they think of themselves thusly.