I suppose it's pointless for me to refer you to the fact that not a single one of these overdoses has occurred at a supervised use site?

Also, basic logic: correlation does not imply causation. In this case, it's the concomitant rise of fentanyl as an adulterant that is causing more overdoses -- and in fact, without naloxone and supervised use sites, the number would be even higher.

Kind of obvious when you think about it.