I don't subscribe to the Judeo-Christian-Muslimic Menschenbild. We are not inherently bad and we are not immune to change. We can take responsibility - but we have to learn step by step. We have to grow up first and get liberties according to our ability to deal with them.
Your argument is that of every conservative at all times. I bet there were some who predicted the collapse of society when "irrational" women got the vote. "Too much liberty. They can't handle it."
That isn't my point and has nothing to do with whether we are inherently bad, which again is a subjective opinion. Some things they do in some countries I think are wrong, whereas for them this is considered the correct way to do it. There is no objective right and wrong here only a subjective opinion about it.
Despite me, disagreeing with some of the things they do, we could probably agree on a whole range of things, like good universal healthcare and a high living standard etc.
Yet this is not enough to have a functional system where anarchism could thrive, because it is purely based on the assumption that everyone can get along, and there is absolutely no historical evidence that this will happen automatically due to a political system or lack thereof because all these systems are biased. because that is how humans function. We are inherently stupid due to our lack of ability to work with huge amounts of data.
If you knew all things on the internet, you would be far more capable of sorting through garbage and facts and ultimately arrive at rational solutions. But we are incapable of this so we lack and get biased information which eventually shapes our extremely narrow worldview. And this only deals with the factual data we have available.
Then you have to account for the religious bias which doesn't follow any rational or logical approach. You can have clear-as-day contradictions yet the conclusion is as if it was written in the very fabric of the Universe itself. This means that there is close to zero foundation for a rational discussion here. It is no longer about what is best for humanity but rather whether this is what the religious text dictates. A simple example is abortion, which is heavily opposed by religious people compared to atheists or less religious people. You can't argue with God, so there is no way to reach a solution that would ever go against what he is interpreting to dictate and as we know, even religious people don't agree on what God wants and don't want.
All these things you have to account for in anarchism, how do you deal with them even remotely? Simply assuming that people will somehow get along is enough to throw this whole idea in the bin. Again there is no evidence that this would ever happen.
To me, the best solution to remove biases and corruption from government is to make it transparent, objective, and based on factual data and the only thing that can do that is an AGI, as it can collect, sort, and cross-reference all data and provide unbiased solutions that could be understood by all humans.
So the only thing humans would have to agree on would be a common universal set of rules for the AGI to follow, which could be, freedom of religion, equal healthcare for everyone, equality above all, basically things that would result in a high living standard for all humans. The most difficult part would probably be that those in charge would have to give up powers and all resources on Earth should be made available for the AGI or all of humanity.
This is probably only possible if resources are abundant, so that would require us to mine space as that would make it kind of pointless to not ultimately share everything.