Cannon's ruling is going to be appealed. If it gets appealed all the way to the supreme court, again (and Clarence Thomas has specifically asked for this in one of his prior rulings), and the supreme court holds with them, then any charges brought by a special counsel in any case are gone. Her ruling invalidates special counsels in general. The office that is pressing charges against Hunter Biden will no longer exist.
The scary part about this is it means that if Trump were to win he would have every excuse and cover from the judiciary to hand pick his own justice department attorney hires to go after people with no semblance of independence. After all, special counsels aren't even allowed to be used anymore. So you're of course right, it does fit into a larger fascist plant, and I certainly don't mean to imply that it doesn't or this isn't all for Trump's benefit.
I just wanted to point out that the current move would also be able to get Hunter Biden off the hook on the off chance that it gets anyone blindly supporting Trump immunity to stop and think for a second that maybe this isn't actually a good thing (since a lot of them seem to have some pretty extreme beliefs about Hunter Biden going to jail).