I think it's a mistake to legalize cannabis and continue to treat it like any other consumer product, opening the floodgates to gratuitous advertisements and dubious health claims. Instead, the sale of cannabis (and perhaps other drugs) should be treated as a public health issue, where the sale is permitted as long as it isn't advertised and proper information is given about the product. The Netherlands partly has th…
The problem is, criminalization of pot does far more harm to society than decriminalization. So, while there might be downsides of decriminalization, the downsides of criminalization far outweight the former.
This is actually pretty similar to how cigarettes are treated in Canada (and many countries). Restricted sales, legal ages to purchase, product covered in discouraging warnings, lots of restrictions around advertisements, tonnes of places you aren’t allowed to smoke (not just inside, but anywhere remotely close to doorways), etc. Basically sends the message “we think smoking is negative, but it’s better to tolerate it in a highly regulated way than to make it illegal.”