How do you know? "Certainly" is an awful lot of confidence for something you've never seen or even credibly proved exists. Unless you are (or personally know) a superintelligent AI, I don't think you have the credibility to assume that's feasible. Perhaps we do get a superintelligent AI before then, and it tells us this was all a sad waste of our resources and squandered entire generation's worth of human lives.

Aerosol injection is a solution, but hasn't been explored because it's basically suicide for the ozone layer. Maybe that helps a future race of UV-resistant robots but it's not a great solution for us fleshy folks. Regardless, preparing for the post-AGI world is putting 10 carts before 1 horse.

There is no case to justify an assumption as true.

How would you judge the impact of 'technology' over the past 20 years? The 20 years before that were pretty revolutionary too, and so were the 20 years prior to that.. and... the 20 years prior... and... Bias comes from the life one's lived.

How to measure the impact, then? Life expectancy? Education? Gender equality? Access to clean air and water? A safe house that the majority of people can afford doing a job they don't hate? All these things that go into Human Development? Of which HDI [1] is but one, of which some have had progress in some countries. But fear mongering, playing on insecurities, that gets investor money for the hope some fraction of wealth can be accumulated by peddlers of such insecurity. You are a useful distraction.

[1] https://en.m.wikipedia.org/wiki/Human_Development_Index