Earlier quoted context omitted.
Do we think humans are better off if the world has more intelligence? The answer is undoubtedly yes IF that intelligence is distributed rather than concentrated. Further concentration of intelligence (power) would be detrimental. Edit to clarify: I mean distributed in the individual sense, not regional or governmental which fall into the detrimental outcome.
Humans I can see benefitting from more/greater intelligence for sure. It could help mitigate existential threats of all kinds. I agree it depends who wields the power. My point was that I think it's hard to argue that the world, as in Earth and it's non-human inhabitants, are better off because of human intelligence. So it's questionable whether more intelligence would change that.
If anything I think reduction in distributed intelligence would and has made the situation far worse.