I don’t see psychology, sociology etc. as something separate to nature. They are part it of it, because they are aspects of us humans, and we are part of nature.

None of these things are true, yet we build systems assuming they are.

Agreed. Or perhaps I’d say some of us build systems using those unrealistic abstractions as excuses for oppression and extractivism.

I don’t think fact that those approaches have been dominant for centuries (millenia in a few locations) means that they are the only approach. It seems that, given we have the ability to reflect on those and realise how unrealistic they are, now would be a good time to try building systems that are NOT based on unrealistic assumptions.

And yes, I realise we’ll never have a perfect understanding of our place in the world, and there will always be flawed assumptions of varying degrees of importance underlying our world view. But we can absolutely do better, and a perfect place to start would be to avoid the assumptions that we’ve just spent a long time testing and found to be untrue.