Consumers of cannabis edibles, for example, are able to go online and find products with a potency [advertised] higher than the legal amount, Mr Smitherman said.

Addition by me. Because that is really the crux of the matter. Sure, you may see edibles advertised with 1000mg or something ridiculous, but there’s absolutely no guarantee you actually get what you pay for, without that regulatory oversight.
And then there’s the obviously flawed assumption that stronger = better.