Decriminalization would improve some things – making supervised use sites easier to set up, freeing up police and court resources, directing users to treatment instead of jail.
However, it would still funnel money from the unregulated drug supply into the hands of organized crime and a lack of quality control would continue to lead to preventable harm and deaths.
People like using drugs. Some people have problems with drugs. Nothing will ever change this.
Providing people with safe access to regulated, recreational drugs would solve far more problems than decriminalizing them.