They actually don't. The opinion that matters is the DOJ rendering and reaffirmation. It's very clear. If Mueller tried an indictment, he would be violating 44 years of known DOJ policy and it would be the end of him. Special Counsel opinions of what they can do are worthless.
Mueller is likely finished anyway and it will all become moot. We may need a Special Counsel to investigate the Special Counsel. What would be best is to have Jeff Sessions un-recuse himself and fire Mueller and then appoint a new Special Counsel who is not biased and will assemble an unbiased team. --The team that Mueller has going is not working on justice, rather they are working towards impeachment on any grounds they can. This overreach and misconduct cannot be allowed to continue.
No, their opinions don't outweigh mine (the collective public). None of these three are involved in this at all. Your argument does not hold water and I assure you, a president cannot be lawfully indicted.
Now that it's been shown to be irrefutable that a president cannot be indicted, let's move on to why Mr. Mueller needs to be removed. Reason 1 --He hired Andrew Weissmann as investigator knowing full well his anti-Trump/pro-Hillary stance and also his failings and nefarious tactics in other cases, such as Enron. Weissman should be removed from the witch hunt poste haste.
With 10 felony counts of obstruction of justice charges waiting for him in 2021 and No DOJ memos or Barr to protect him he should be