I watched that one a while back. Scary stuff, and one of the reasons I'm interested in Seasteading.
I think we're irresponsible because it's somewhere out there off the coast. If we're actually living out there in small groups, tending kelp gardens and growing our own reefs, then we can bring what's currently desert back to life.
It sure was an eye opener.
There's probably a lot we can do, we just need to do it I guess. Trillions spent on military technology and armaments...bugger all on the important things like saving the planet.