I'm a parent, I guide my kiddos when rationality escapes them. The process itself, parent-child, teaches them how to make their own decisions. Governments can't teach people how to make their own decisions.

The statement that trade relationships must be fair is some sort of neoliberal mumbo jumbo. I don't accept it as an assumption or a consequence. You can accept it as axiomatic if you want, but I don't see it as a consequence of any valid logical train of thought.

Yes but govts can try to minimize the damage from people making bad decisions. Which they do constantly, across all areas of society.

And what you describe as "neo-liberal mumbo-jumbo" I think for most people would be seen as simple commonsense.

It's a social fact which is different from an objective fact based in reality.

ok well I think for most people this "social fact" aligns exactly with reality, and as you've already stated, people are always rational actors so...