Wrong.  Liberals want to damage the black market.  Taxation will be moderate in order to keep prices lower than the crappy weed being sold on he street. 
Barriers to entry:
- Licencing from Government
- Quality growing space
- Capital to purchase high-tech extraction equipment for oils and edibles - Big revenues for those that have this equipment (Aphria)
- Growing knowledge to produce specialized strains for specific uses and purposes.