Focusing on economics (this is METAR after all) look at point #5, a veto over non-NATO investments. As part of a ‘Monroe Doctrine’ this would prevent an un-named Asia country from exploiting the minerals in Greenland. What minerals you ask?
From a 2023 “Review of the critical raw material resource potential in Greenland”:
The review specifically reveals that the Gardar province in South Greenland constitutes an exceptional accumulation of CRM [critical resource minerals. This is documented by the known rare earth element (REE) deposits, some also hosting very significant lithium, fluorite, tantalum, niobium, hafnium and/or zirconium resources…
East Greenland stands out by hosting the very large Malmbjerg molybdenum deposit, the very large Karstryggen strontium deposit, and the large platinum group metals (PGMs), titanium and vanadium Skaergaard deposit.
Additionally, and due to its relatively under-explored status, East Greenland can be considered to still hold a significant potential for yet undiscovered deposits of these commodities…
True, but the absence of a negative isn’t necessarily a positive.
There’s a reason the administration initially really wanted control over Greenland, rather than just doing what we were already permitted to do under the treaty. They realized it would be extremely difficult to get the Greenland government to allow much extraction of the minerals you describe. There’s a reason why there isn’t any significant material extraction economy there now - the government has resisted allowing any of it, out of a mix of environmental concern and philosophical objection to uranium extraction (which is often a required by product of this). To say nothing of the massive infrastructure and metallurgical processing obstacles that would have to be overcome to have an economically viable project there.
There’s no real guarantee that we’ll get anything from keeping non-NATO countries out. Not only was there very little chance they’d ever end up doing anything there, there’s not a really big chance that we’ll ever do anything there either.
If that “un-named Asia country” happens to be China, there are not many reasons that it would need to exploit (great word you use!) Greenland since they have most of these in abundance already. That’s one of the main reasons that the administration has backtracked on tariffs and likely part of the reason Xi is being given such an extraordinary state visit welcome. That, and because he is such a strong leader, of course.