That's the point when I say: "you've given up on that", meaning that some societies have moved to something else, but there are many in the world. It's important to understand that it's a choice, there's no "right way forward", it isn't evolution, just organization.
> we cannot go back to that stage
Not saying we have to, but it might happen in the future for many reasons (nuclear wars, climate collapse, worse pandemics, etc). The point above is about that, what if we find a DIFFERENT way? It's up to us.
> humanity has given up completely on being hunter-gatherers
This statement doesn't help anyone and it isn't true, there are millions of hunter gatherers, and many more that are in between that and very limited agriculture. Do not mistake the west for humanity.
P.S.: this is just food for thought, in the sense that we must be open to new ideas, even those that completely destroy our "normal" perception of the world if we really want to advance as a species.