In all cases I’m aware of, “decriminalization” refers to legalizing possession of small end user amounts. It doesn’t legalize production or sales, so the issues

In all cases I’m aware of, “decriminalization” refers to legalizing possession of small end user amounts. It doesn’t legalize production or sales, so the issues you described remain. If low drug prices is what you want, we should legalize the production and sales of drugs, but keep usage illegal.