That fact would undermine the pitch, which has been tailored around the idea that "[these recommendations] would be in the interest of the health and safety of ALL Canadians." (my CAPS)

The recommendations being pitched benefit a very small minority whose purported interactions with the medical and pharmaceutical industries have caused them harm.  Despite these industries being extremely profitable and regulated, we are expected to buy the pitch that rather than hold those directly responsible liable for the clean-up, it is the public's job to pick up the tab for the recommendations being made.

Skipping over the street drug part of the problem is an attempt to cultivate a no-fault style of argument regarding the users that justifies public funding for the problems being observed.   Skipping over the medical/pharmaceutical contribution is the second leg of that same pitch for public funding.

It might still make sense but for the deficit swamp our current government manufactured.