There's always two sides to a coin right? While everything you said is true, I think that there's a pattern people are generally aware of in this world. Things that don't serve a purpose, vanish.

We see it in worker replacement, in vestigial organic structures that shrink over millinea, and in the tools and objects we keep with us in our lives.

The question, once achieving this grandiose goal, is how long, and by what mechanism, will we continue to enjoy the fruits of our labor?

Perhaps there will be a time when we may enjoy this world without the pressure of being a cog within it, but ultimately this time may be short if we are able to manifest it at all.

The unease comes from the power we lose when we cease to be the means of production, and instead become a vestigial organ on a beast much more complex than ourselves.