They're not really being told "no", though; mainly the Supreme Court is simply not taking the cases and leaving lower rulings in place. They could take one of these cases and issue a ruling that firmly shuts everything else down but they haven't done that. One could surmise that they haven't done that because the Federalist Society "justices" are waiting for a case with facts they like more to issue the ruling they want in a narrow way that will hurt Democrats and minorities without impacting the GOP. They're looking for a way to tailor a ruling that prevents blue states from gerrymandering while allowing the GOP the legal right to pick their voters in red states.
And, as we've seen with the cases of the praying football coach and wedding website, they don't even care if the cases are real or not as long as they can use them to navigate to the ruling they wanted to issue all along.