This kind of stuff drives me crazy sometimes. There's is little that's unique to AI here. These are the effects of any kind of industrial expansion. They're also the effects of population growth, in general. This stuff is a problem iff AI is a scam or hugely oversold and these resources are being wasted. But that's a different argument and a less clear-cut one.
> It re-enforces the horrible, dangerous working conditions that miners in many African countries are enduring to supply rare metals like Cobalt for the billions of new chips that this boom demands.
This point also deserves special mention. Most green technologies (solar panels, electric cars) also require a bunch of cobalt. Again, the "badness" seems to depend on your a priori evaluation of what the cobalt is being used for and not the cobalt mining itself.
I think there's also a pretty good chance that if a robot that could mine the same cobalt with no human intervention appeared tomorrow, many folks would complain about "hard working cobalt miners in Africa losing their livelihood to automation".