Not really. I think there's a misconception that we want to solve all the problems and be good and pure, and because we can't do that we've got to be pure evil. That's not how it works. We're not trying to solve inequality or anything. That's just capitalism. We're trying to stop (and now sink) the carbon in the atmosphere. That's all. We can keep our shitty unequal capitalist world where we exploit poorer nations etc etc. That's a separate problem.
Also, we don't really need to use the specific metals he's outlined. We can use others. There are plenty of chemistries available, and there's a lot of lithium (in Australia for example). As long as the global south doesn't get the bright idea to use as much energy as the global north, we'll be fine.