Because there is no govt based in other side of the world controlling the resources of mainland argentina. Its that simple

Here they are extracting billions of worth of oil from the offshores of falklands in joint venture with israelis. These resources belong to south americans not britishers, its that simple. https://buenosairesherald.com/world/international-relations/argentina-warns-it-will-take-action-over-illegal-offshore-oil-drilling-project-in-malvinas-islands

Britishers should fuck off.