Clearly, the Trudeau government is intent on attempting to control cultivation and production, which would be a disastrous move. 
Why? 
First, such a move would keep the black market alive in the cultivation and production business. 
Second, large producers would be more susceptible to virus and contaminants being distributed far and wide. With small independent producers serving local communities, any contamination would be restricted to a small area. With big national producers, contamination and its impact could be spread far and wide. Have we learned nothing from the contaminated meat scandals? 
Third, by only allowing a few large producers, those large producers would basically have monopoly, which would result in a lack of competition and most likely higher prices. It would also encourage the black market to remain active, undercutting the big national producers.