Many criminal gangs from biker groups to foreign cartels are doing the same thing and reaping profits in the $100Bs scale annually.
Your argument is not an argument for incarceration, it is an argument for abolition of prohibition and regulating the sales of some psychoactives.
The same stone would hit the fentanyl epidemic, it would hit the pushers of ”zombie drug” laced cocktails, it would hit cross-border trafficking, to name only a few. Society would massively benefit. So would the economy.