Lets just give an example. Lets say one day your driving along and get pulled over by the police. The officer pulls you over walks over and smells marijuana smoke coming out of your car. He asks “Do you have any drugs on you?” He already starts treating you like a criminal and getting weary of you, he asks you to get out of your car and asks if he can search you and the car.
You quickly tell him that you have a medical license to carry and smoke marijuana. He quickly takes of the hand cuffs, gives you all your belongings back and lets you go on your way.
Hears what I wonder. How can someone go from being a criminal to an ordinary medical patient with a plastic card?
Does this mean marijuana is good or bad? Are people without the card that smoke marijuana bad, and people with weed cards good? its such a hypocritical scenario to me.
Why can you get a ticket for driving and being high, DUI- driving under the influence, yet an Olympic athlete get stripped for a gold medal for using marijuana because it is a performance enhancer? hmmm? makes no sense to me.
Senor Mad 
There are so many questions. If the answer is not money, power, fame or sex, then it’s a mystery.
lol your right!
The answer is politics, prohibition and the big companies. Marijuana is only good, but there’s too much politics surrounding issues.
Your right too, if they can’t tax it its illegal, the big companies have too much money invested in pharmaceuticals, and politicians have to much money invested in pharmaceutical companies. Womp womp
They can tax it, however no one is willing to admit that for years they were feeding millions of people information that wasn’t true. And for pharmaceutical companies it would be disastrous as Marijuana cannot be patented. Nightmare both ways for the bigwigs that run the countries.