Disastrous how?
There's also been some weird ownership questions with former Toronto Police chief Julian Fantino who spend a decades-long career busting people for pot and opposing legalization only to have a come-to-Jesus moment about its medical benefits just in time to start a business around it and cash in.
[1]: https://www.theglobeandmail.com/cannabis/article-mapped-onta...
[2]: https://www.retail-insider.com/retail-insider/2020/06/canada...
I like to collect anecdotes about the ineffectiveness of central planning compared to markets. Not a free market fundamentalist, but what they do well, they do very well.
From my point of view it's less a failure in concept and more just a matter of tuning— which has been adjusted over time, though as expected, there has been some of that post-rush activity as various players have bought each other out (but probably a lot less than there would have been without the slow start).
Understandably, that's probably a transitional pain, and may be more of a bureaucratic hurdle than something germane to cannabis. But all this to say that changing these kinds of things takes a lot of careful planning; you can't just flip a switch to solve the problems of prohibition.
[1]: https://en.wikipedia.org/wiki/Cannabis_in_Canada