They worded and ruled the way they did, because they know there is a 0% chance Biden would carry out anything he would have to declare immunity for, because he is so worried about being a “both sides” politician. And the SCOTUS didn’t make any of that “the law”, it’s still illegal, BUT the President can now claim immunity for breaking the law and nobody can do anything about it. It plays against the morals of the Left, since the Right sold their morals for power long ago.
And Biden could certainly do something that counters this without having to break the law, and exercise this new immunity. He could be running on expanding the Court, bumping the number to 13 Justices (one Justice for each US federal circuit court), adding new qualified Judges instead of inexperienced partisan hacks. He could run on adding rules on ethics and time limits for the Court, make the members (or a staggered amount of them) do a rotation out and back to one of the 13 US federal circuit court systems every 4 years (or whatever). This would go a long way against this weaponizing of the Court with bad faith Justices that are putting Politics/$ over the country and the law, and it would be all legal.