Biden pardons his son. Right or wrong?

On the face of it, Joe Biden's dramatic change of mind about pardoning his son, Hunter, sends all the wrong signals, politically, both for him and his legacy and for the Democratic party. It also opens Biden up for some revenge-type action by Donald Trump and co next year. So, all in all, the sudden about-turn after promising not to pardon his son, facing a possible three years in prison for tax evasion and possessing a gun while using drugs (forbidden under federal law), looks like a false and disastrous move by the outgoing president. But hang about! Hunter is his son! Ok, Biden is in a unique position, unique in the sense that no other American citizen has such a privilege, he has the right as the departing president to pardon whom he pleases. Sitting round the table with his family over the weekend, every member, no doubt including his son, would have pleaded with him to save Hunter from prison where he would have had a grim time as the son of a president. How could Biden have said, "no I'm going to stick to my principles, my son has to take his punishment." Had it been a Trump son, Trump would surely have pardoned him. Biden claims he decided to change his mind because the charges against Hunter were politically motivated and unreasonable and too punitively-weighted for the offences committed. The plea deal which was initially negotiated and then thrown out by a judge, would have sorted it all out without having to get to this point. So, poor Joe had to make this high-risk decision to save his son and his family. As I say, Trump would have done it. The wording of the pardon is so all-embracing that Hunter can never be charged again by a vengeful Trump but that surely makes sense. The lawyers involved wold have drawn up the pardon document very very carefully to ensure there were no gaps or loopholes. I say, give Joe a break. He has sacrificed his presidential reputation for the sake of his son. That's honourable and courageous.