I'm a registered independent and my opinion on this has nothing to do with my politics. I'm pro marijuana/thc but I also think the law should be applied fairly, regardless of your celebrity status. All of the hypotheticals proposed in this thread are frankly stupid.
As a regular traveler to Russia, she knew the law regarding vape cartridges and she chose to take the risk and she came up on the wrong end. I don't think she should be used as a political tool for Putin, but rather be treated like anyone else.
Manufactured products containing thc are a felony here in most of the US, and unless you don't consider a felony to be big deal you should be very careful about transporting them. I have an acquaintance(white chick) on 5+ years felony probation for a single thc vape pen that was found in her car on a routine traffic stop. She fucked around and found out just like Britney Griner did.