Yes, he is not calling for true anarchy and I don't know how much he even knows about it. Having participated in a few anarchy groups online for quite a while, it has become clear to me that most people who call themselves anarchists actually don't really understand what it really is in it's deepest form... So I am not surprised that more people don't fully support it or think it is possible or sustainable.

The deceivingly simple description for anarchy is 'no rulers' - not 'no rules', but simply that there will be no overpowering of one by another. The part that is usually missed is that once someone seeks to overpower another - whether deliberately or not - anarchy no longer exists.. So it is not that anarchy automatically results in violence, but that once violence begins, anarchy has ended.

I understand what you are pointing to with regards the sustainability, in that people often do resort to violence and overpowering.. However, any form of government is also a form of overpowering - so cannot be superior to anarchy. The only solution then, that can work, is if all those who wish to survive on Earth voluntarily choose to increase understanding and awareness and balance, such that they are empowered and can help others to be empowered enough to never resort to such barbarism as would end anarchy.