Ms. Griner violated a law that is essentially identical to the laws still existing in some U.S. states. If she would have been caught with a bunch of cannabis vape pens in Louisiana, the outcome would have been similar. Perhaps a shorter sentence, but Louisiana like Russia sees cannabis through a criminal prism.
There are many thousands of people currently in prison in the U.S. for the same types of crimes. It seems completely nonsensical to be freeing someone from a foreign prison for the same crime that others are in prison for in her home country.
Had she been imprisoned on trumped up charges or for something fundamental, such as expressing her political views, I'd be much more sympathetic. But she knowingly violated a law that parallels ones we have in many U.S. states.