All I can say is that you have way more faith in the Justices than I do at this point.

I wouldn't call it "faith," rather than "jealously guarding their own power." In our current system, those Justices are incredibly important and incredibly powerful. They like being important and powerful. Allowing Trump to become a dictator makes them unimportant and powerless. So rulings that say that the President still has to obey the Constitution and follow the laws that Congress has adopted - and that the SCOTUS is the body that determines whether those conditions have been met - are in their naked self-interest.

Unlike elected officials in Congress, the Justices don't face the voters. Trump doesn't have that hold over them. They will be there long after he's gone, and he can't throw them out. Nor can MAGA writ large. So even if Trump, and MAGA, want to completely rewrite US domestic policy, it is entirely within SCOTUS' self-interest to require them to follow the rules while they do it.

Some of the Justices share Trump's belief that the power of the President under the Constitution are much more expansive than previously understood. They'll vote with him when they think he's right. But none of them would share a dictator's belief that the President can, say, dissolve Congress or choose to ignore the Legislature altogether.