Well, the scale you ignore is that the house is burning unattended (PoliPolice are busy) in the dry season and the whole neighborhood (Country) is likely going up in flames. And it’s not Joe’s doing.
How is letting some asshole get away with fraud and negligence supposed to help resolve the "fire" in question? At best, this is a major distraction that everyone will be talking about for the next decade.
If your absolute worst case scenario came true, however implausibly, and Hunter Biden were executed for treason for lying on a registration form, that would still be better for the country than this pardon is. At least then "our side" would have a martyr, and Trump would be obviously in the wrong for killing him, as opposed to our actual situation, in which "our side" has nothing but a credible accusation of nepotism.