Many Europeans love their countries but use Euros rather than the old national currencies. Also most countries allow mines to be bought and sold. I'm not sure the Argentina experiment will go well but not really for those reasons.
Milei wants to submit to their bully and give away their national resources, and it's not just about Lithium: https://cancilleria.gob.ar/en/process-sanctions-against-oil-...
We shall see. Your link is about arguing about oil near the Malvinas / Falklands which is kind of a different issue.
What you're saying is factually true but overlooks what happened with Greece, Spain, and others during the 2010s.