From The Truth About Guns:

If by some remote chance Biden-the-younger is actually charged by the Justice Department (don’t hold your breath), tens of millions of users of marijuana in states where it’s been legalized will have Hunter F-ing Biden arguing that under Bruen, the federal law banning gun sales and ownership by drug users is unconstitutional.

Biden’s lawyers aren’t stupid. They’ve surveyed the legal landscape and know that’s the direction things are going since the Supreme Court’s decision was handed down.