You can grow it at home and they can’t tax it.
If the goobermint could guarantee a taxable revenue stream, it would be legal. Just like alcohol and cigarettes.
They would not have a problem with that. Have you read the medical studies on just how dangerous marijuana is to the lungs, heart and how it increases schizophrenia and bi polar illnesses? I think it's a little more complicated than the dollars and cents of taxing it!
For that matter, you can make Alcohol and grow Tobacco at home. I have, I’m not very good at it so I buy both. I also grow tomatoes apples and buy them as well. The only thing I grow and don’t buy and get taxed on is Chicken Eggs.