So what that a monkey is a "lice hunter"? In English, an anteater is an anteater and a wood splitter is a wood splitter. It's not a very special way of naming things. Maybe this language has no value to anyone except its own users, but they already speak it, so no effort is needed.
These activists always have a dark intention in their ideas that they want some poor indigenous people to be burdened with the work of learning and using a dying language. If young Ojibwe people are choosing not to use it, then maybe it's because they don't want or need it. I also didn't learn much Morse code as a kid despite older people wanting me to. Turns out it's no longer as useful as it was back in their day.
"Language, Treuer says, defines nations, connects generations and allows a culture to express its perspective on the world." Yes, and English does that job much better because you can actually communicate with the world and multiple generations. Different cultures do alter it with local slang or styles of speech and it's still intelligible while also defining their identity.