....
I mean these people aren't shooting up in public when you're going to a location. You're physically going to some sort of clinic, being given a syringe and a 'room' (could be a real room, or a small private area) then you shoot up your heroin, probably stay for a little while and then leave. This limits the amount of LETHAL overdoses (as there are medical staff trained there to help) and the amount of diseases that are spread through people using and reusing needles.
It would seem that the many syringes in the streets and gutters disagree with your santized, pure view of blissful safe shooting up.
You do understand that there are many studies that have shown that safe areas to use syringes and stuff ensure that people aren't dying, right?
https://www.pewtrusts.org/en/research-and-analysis/blogs/stateline/2018/01/12/injection-sites-provide-safe-spots-to-shoot-upIt gives people that are addicted the best chance of getting to treatment.
Is that something that you support?
Ideas like this are definitely worth supporting on a trial basis.