You know in many states, it is illegal to distill liquor. Even though marijuana could be legalized, you could be subject to the same restrictions.
With an unregulated, and decriminalized, system you would not be subject to those kinds of restrictions. The cost of the product would plummet because of a surge in supply. People would grow their own, with out fear of arrest. It wouldn't be hard to find, it’s not hard to find now and its illegal.
If it is a regulated substance like liquor, you would have to buy it at a store, and be subject to punitive taxes.
But, I suppose some people want their freedoms removed, their money taxed. All that for the convenience of buying a packaged product. Hey, if you think thats better, more power too you.
Make up your mind.