I've worked for local city government, who would want to know about black market possibilities in order to better plan how to designs legislation to close the opportunities for them to grow.
I've also worked for private consulting firms, who would want to know about possible business opportunities, because it's not always illegal sometimes it's just moving fast and breaking things.
I also come from folks who always lived in a grey area economically and see this type of opportunity as legit, like you said nature healing. The market will always find equilibrium. I still have kin who run wine from France into Canada via those small French owned islands yo ho yo ho 😅
And yes, all of those points are good to consider. In economics it always depends. It's still too high of a delta to be considered normal. It would need analysis I'm not going to do with data that's not being collected to really knuckle down into.
What is the price of roast beef at your grocery store?