No. You plead the 5th once you are in court. This says that when Nixon wanted the FBI to stop investigating the Watergate break-in, we couldn't ask why because the prez is supposed to talk to the FBI and we can't question his motives. It says that when Trump asked Pence to hold the vote and bring in fake electors, it was official communication and therefore legal -- because we can't ask why. It says that when Trump wanted false charges of fraud brought up for elections, saying his lawyers would figure out the reasons later, that was OK because he's officially supposed to investigate fraud. Prior to this, any potential overlap between the Office of President and potential Candidate for Presidency (and/or candidate for future jail term) could be investigated as if it was not Presidential until there was a solid defense as to why it was official. The ruling turns that on its head and says prosecution must first find proof that actions were unofficial -- and do so without the ability to ask about motivations -- before filing charges. We want the official/unofficial decision to be made with the weight of context and done in court rather than putting prosecutors in the position of 'illegally' investigating a President before they can figure out what actually went down.