Twofold thoughts on this. First, it's the same thing they do everywhere: if they can't get the big win, they start chipping away at the edges, the fringe cases that let them establish precedents they can use later.
And secondly, it's a defensive move, to further differentiate the territories from the states, so that future efforts to give statehood to these areas will fail. In a really cynical viewpoint, it establishes subservient status for territories, including future "acquisitions" like they keep referring to
You know, I read "Donald Trump lost his temper with a reporter" and my immediate thought was "It must've been a female reporter". Three words later, yep! [I'm mostly only surprised that he didn't insult her as well.]