This is also true and very immediately relevant for the near/medium term.
But, if the US as a state/cabal of rulers is even still at all capable of long term planning, presumably they would realize the near medium and long term... 'problems' that could be 'solved' by at least starting the process of controlling the territory with the thing they need now and almost certainly will need in the future.
I mean this is simplifying but think of it like iron in a civilization game. Its a critical strategic resource... very likely 'worth' fighting over, unless you are exceedingly competent in many other realms of statecraft.