I think aiming for extinction is shortsighted and puts a lot of blame on humanity as a whole for the wrongs of colonialism.
But reducing our population, especially in countries with a larger carbon footprint (and not in developing countries as eco fascists would prefer) is a worthy goal.
It really doesn't get general knowledge correct.
AI will often confuse itself because the answers are probabilistic. So it often is right, but just as often is hallucinating random BS, because AI doesn't really know shit. It just detects patterns.
I just saw a post on Reddit about GPT claiming Argentina is the second most populated country in South America (which is false, it's Colombia), but since Argentina is usually second place in most lists in the region, GPT tends to place Argentina in there anyway.