I may be reading the critiques rather than the original "techno-optimist manifest". Either way, I want to avoid the original article for some reason.
"Optimists" may just be inevitable. But we need a few generations of intentional stewards. We need to engineer resilience and sustainability in our systems. Else we would have to rely on "Apollo missions" in the future (government setting the specific moonshot goals and creating highways to achieve those); rather than on "optimists" inside the macroeconomic structures to achieve those.