I think there are several categories of darknet economy though. Drugs is very different to contract killing and contract child abuse and torture as an example.
Most people probably could live with drugs legalisation despite personal objections to it. I certainly for one wouldn’t much care for a world with legalised contract child kidnap and torture and contract murder, though I totally accept it is hard to stop humans buying whatever they want in an anonymised marketplace.
Interestingly, if they legalise those large majority parts of the darknet such as drugs, the much smaller minority parts remaining make it much easier to ban darknets altogether.