Because pushing addicts to the fringes gets them killed, like the article says, but it also unnecessarily puts them in police crosshairs. They don't deserve to go to jail because they can't afford a home to do their drugs in like the white-collar addicts and they don't deserve to die because no one cares that they OD'd.
If you want to see addicts off the streets and out of the playgrounds then support consumption sights, safe supply, and enhanced rehabilitation that includes medically supervised detox and psychiatry.