Well, they can if they want but I really doubt anything gov. funded is going to be half as good as what most of us can grow, and it'll be double the price! Yeah.. they can try it.. but they'll fail miserably..
People will always grow it.. it's just in our nature.. I started when I was 15, and before I actually used it medically.

Anyways, let them try, but don't outlaw growers, just have it as an option for those that could benefit.