It's not that simple. It might still be a net negative if it increases drug demand by ease of access.

I don't think you increase demand by ease of access.

Also buying bitcoin, exchanging to Monero, installing Tor, understanding the risks, etc. Is much more work than just finding the next dealer.

> I don't think you increase demand by ease of access.

Well that's the entire principle of price elasticity. The less costly (not only in terms of money, but also in terms of risk and time) something gets the higher the demand, at least up to a point.