I think that the practice itself is necessary - there are simply cases where the rest of the justice system gets it wrong, or the executive wants to make a change (like when Biden pardoned anyone convicted solely of small federal marijuana crimes). It has ALWAYS been vulnerable to abuse, tho, and it has only been societal/political norms that has kept that abuse as low as it has been. From what I can see, there have only been 3 (now 4) president who have pardoned their relatives - Trump pardoned his son-in-law's father, Clinton pardoned his brother for old crimes, and Lincoln pardoned his sister-in-law, who was married to a Confederate General, as part of the Amnesty and Reconstruction.My initial reaction was sort of "**** it who cares?" but it was not the right thing to do. I could see a new American tradition where on their way out an administration does a prophylactic series of pardons for their close allies, family and friends to prevent the incoming administration from going after them.
And PLENTY of presidents have pardoned their friends on their way out. Maybe Carter didn't, but he's about the only one I can think of. Oh, and Nixon, of course.
But I think it's reasonable for Biden to believe there is a distinct possibility Trump and the MAGA crowd would continue to attack Hunter for no damn good reason. Also, frankly, there's not a lot of point in trying to do the right thing with Trump and his cronies coming in to destroy everything. I guess I'd say he was wrong to do it, but did it for the right reasons.