I watched the video you mentioned and got a similar feeling realizing Lifting Mike is a techo-utopian. I probably was also one once upon a time; it seems like something that would come rather naturally to someone who was an atheist growing up in the 90's (when I do think there was a legit techno-optimistic atmosphere that isn't just my sense of nostalgia) - perhaps we all need something to fill the god-shaped hole in us.
But if you start doing some straight-line projections, things simply do not look so rosy. I see a similar situation at play with climate change; we are faced with an existential crisis and many respond that "technology will save us" in a way that feels interchangeable with "god will save us".
I think everybody should be endlessly optimistic when they're younger - that innocence is the gift of youth. But at the same time I find it odd for somebody to hold such values later in life, because life experience teaches you otherwise in endless ways. My issue was nanotech - perhaps you're also familiar with names like K Eric Drexler et al? Nanotech was going to fix absolutely everything, cure all diseases, turn radioactive waste into arbitrary materials, and basically reshape humanity in every positive way imaginable. Except none of it came to pass, at all. Heh, or yeah the 90s view of what the internet would become.
In general find I the simulation hypothesis a much more desirable replacement for religion. It lacks the various logical flaws or assumptions or singularity types, has a pretty sound basis in reality, and also keeps the extrinsic 'better-be-good' factors of religion, given that the simulation could be for any reason - entertainment, education, or even something like rehabilitation or training. And I think that extrinsic pressure is generally good after seeing what societies without any sort of guiding light seem to trend towards - pseudo-nihilism paired with hedonism is not a path to a fulfilling existence, or perhaps even a sustainable civilization.
But if you start doing some straight-line projections, things simply do not look so rosy. I see a similar situation at play with climate change; we are faced with an existential crisis and many respond that "technology will save us" in a way that feels interchangeable with "god will save us".