Earlier quoted context omitted.
As you pointed out, the rapes and assaults are ongoing. By making the bottom of the market illegal (by making it uneconomical), you haven't stopped these crimes from happening, you've simply forced them to occur in the black market where there is even less of a chance to prevent them. Except the numbers are now smaller, less people are put at risk and less people see that risk realised. It demonstrably has made the s…
Since the article doesn't get into your purported statistics, I can only speculate as to what you are referring to. People in the U.S. often try to retroactively justify tougher drug laws by pointing to lower crime rates, when in fact often times people are simply less likely to report being victimized because they were engaging in an illegal transaction. Moreover, reality has a way of resisting controlled experiment…
Drugs are not like cabs. You can't get a licensed drug after five minutes wait. Nobody actually wants or needs a specifically illegal cab, they just want a cab. The analogy simply does not work.
What's unconvincing is you calling my argument a fallacy and then falling back to "oh but it's hard to measure!"
--edit-- also FFS you think anyone's put off reporting assault because they were in an illegal cab? What the hell are you on? It's not illegal to be a customer, it's illegal to run the service.