I wonder what you are basing this on? I'm guessing neither you nor I are actually in the drug industry. Clinicians and people dealing directly with the problem say differently. They busted a multistory reactor with tons of reactants waiting to be processed. Most of the people who were busted working there ultimately died of liver failure. Clinicians say that people drying out from the newer P2P meth display qualitatively different experiences with much longer periods of recovery after shorter periods of addiction. Previously P2P meth was low quality and undesired because it contained a large quantity of undesirable materials that lead to heart pounding as opposed to a desirable high. Improved processes allow chemists to remove the obvious undesirable quantities but are believed to produce introduce contaminants.
My source is a nytimes and other legitimate press as opposed to drug use.