In my opinion, a pot smoker is no different than someone who drinks alcohol. That said there are some people who get addicted to pot and they can't operate without it. There are also people who are addicted to alcohol and cannot operate without it. They've been saying "we just don't know enough about the long term effects" for what would equate to long term time.
I believe anyone who can't give up alcohol or weed when they are given a mandate and the options are; make a few million a year off weed or keep smoking weed and make $0. Whether that's quitting pot, alcohol, cigarettes, or even sweets, if you can't do it, or choose not to, then you may have a dependency problem.
I hope Randy Gregory can get whatever else is going on in his life under control so that he can make better life decisions for his future.