On any given Friday or Saturday night at clubs in Moscow, you will find the children of oligarchs and higher ups in the Russian government using and selling every controlled substance known to man. In fact, when people talk about Russia just being a gas station, they forget that Russia is actually a big innovator in recreational drugs with krokodil being one of its more famous exports. And look no further than Russian athletics if you want to see how concerned the Russian government is about illegal drugs.
Russia's national drug enforcement policies have been more about using drug interdiction to go after enemies and the poor. Russia has had a huge heroine problem. Weed oil is the last thing of concern for Russian drug enforcement. In fact, small quantities of weed are without criminal possession penalties in Russia. Griner is only getting hit because she was caught at the airport. And if you think that was just a coincidence, you are a fool.