I don't think it's a direct help, but entities see bitcoin as an opportunity to make money out if. Just like what you said, the mining company requested the Navajo people to used their land for bitcoin mining. 2 workers to 11 workers? I don't think it will put a big dent on their local economy, unless they are like 20 people in their neighborhood. Yes, I know that bitcoin has open a lot of doors, but this is just an exaggeration to me.
When I was reading the news I was thinking the same thing. They paint it as a great benefit for the Indian community but who really profits is the Canadian firm. It may be a little helpful but it's an exaggeration, starting with the title of the article that looks like they are all Navajo mining with PCs from their homes.