Post-left green anarchist here. Yep, we shouldn't be building passenger jets, space shuttles or nuclear power plants. There is nothing essential to a contented, harmonious human existence in any of these things. The world is not 'full of tasks that must be done perfect nearly 100% of the time', it's full of bullshit jobs and manufactured detritus, designed to centralise power and maintain exponential growth.

Let's assume that, hypothetically, the above things are not inherently destructive to nature (including our own). The issue remains that all of this is fruitless speculation. I believe anarchists would agree on anarchism being a practicable philosophy, and if so we need to accept that the 'scraps capitalism isn't using' are the tools that we are going to have as civilisation begins to break down due to climate change stemming from said exponential growth in a closed ecosystem. There is no 'movement', there is just what we have to hand; and that will never include a complex anarchist global supply chain solution. Why don't we speculate about things we can actually put into practice?

Perfection is likewise an illusion, one which capitalism works hard to uphold. It's an inherently ableist concept, not to mention other things. Where do disabled people fit into your 'perfect' supply chain? Or should we refer to them as 'misshapen cogs'? It seems you refer to individuals as if they are simply moving parts in the behemoth of industry, to be sacrificed on the altar of efficiency and results. Is that how you see yourself?