The Supreme Court justices are not blind nor are they ignorant on what the Democrats are doing.
The choice they have is to go along with allowing the Democrats to prosecute President Trump on false charges and in effect open up every President from this day forth open to be charged, convicted and imprison by any prosecutor in the Nation.
Or, they could follow the Constitution that would have any misconduct (or crime) be dealt first with Congress via impeachment and if there was any criminal law violation charged in Federal Court. By bypassing Congress they will seal the fate of our nations as being just one more banana republic.
But Trump is not the President.
They have and easy out, actually. Rely on the already submitted case on J6 and further find that the government lacks standing to pursue this case because Jack Smith was not properly appointed and dismiss it also pointing out that pursuing political prosecutions is constitutionally forbidden. Then duck the whole mess.