Okay, yes, under the law that currently exists, Hunter Biden was absolutely guilty.
On the other hand...
Doesn't it strike people as just a little bit fucked up that you can lose a fundamental constitutional right that easily? Should you lose the right to, say, vote if you smoke pot (which is still illegal under federal law!)? Should you lose the right to a trial by a jury of your peers, with legal representation, if you're addicted to Oxy? Should you be forced to go to an evangelical, Christian nationalist church if you're an alcoholic? There's a pretty decent argument that conviction of a violent crime--including misdemeanor domestic battery--should cause you to lose your 2A rights. But this isn't a case of someone being convicted of anything.