Mueller said "It would be unfair to potentially accuse someone of a crime" knowing the issue could not be resolved in the courts. Thus, Mueller's interpretation broadened the Office of Legal Counsel opinion barring the indictment of a sitting president. Under Mueller's reasoning not only can the President NOT be indicted, the President cannot be ACCUSED. Attorney General Barr's Justice Department expanded Mueller's logic to argue that a President cannot even be INVESTIGATED in state court criminal proceedings.
Ultimately, one whistleblower compliant was more effective than a two-year investigation and 400-page special counsel report. The whistleblower made a clear accusation against the President and Attorney General, which is why it was covered up, but Mueller refused to take that final step. He blinked. By refusing to place the tip on the spearMueller gave President Trump and Attorney General Barr room to spin the narrative and blunt the attack. Ironically, the whistleblower displayed more moral courage and patriotism than a decorated Marine or Navy Seal. The Marine blinked, the Seal punted but the whistleblower saved the day.