"No policies we have tried or are collectively willing to try will stamp it out" is the accurate version of your ending statement, whether talking about drugs o

"No policies we have tried or are collectively willing to try will stamp it out" is the accurate version of your ending statement, whether talking about drugs or insider trading. It's unreasonable to rule out every policy as only an infinitesimal portion have been explored. How best to organize humanity might be the least solvable and most open ended problem conceivable, one worthy of a multiverse scale simulation. We can't make solid predictions about what inputs lead to what outcomes. Species-wide conclusions about the impossibility of ending some specific immoral behavior depend on an expectation of irrationality from people, that they're unable to abandon the status quo.