Just because some medicines have kind of happy or fun or hallucinating effects don't make them more or less controlled.
And your argument about MDMA, it's already a developed medicine which is available under subscription. Why do you talk about delays?
And most medicines take more than 5 years to develop and release to market (also those without funny side effects sought after by drug abusers).
It's funny how you talk about ketamine being not 'marketed'. Why should a drug be marketed? It's a medical doctor who should subscribe it to patients he sees has a need for it. For sure medical companies might market it to doctors, but overall drugs should not be 'marketed'. Just see the issue with Purdue Pharma and the opioid crisis in the US.
Turns out MDMA is on list I, despite being used medically for a decade without problems. Currently there's no MDMA available, at least in the USA, under subscription nor prescription. It seems that is being researched, with extreme difficulties for being in list I, as a remedy for PTSD.
I'm done with this thread.
Just look at the history of ketamine: known since 1970, it's controlled until 2000's when finally is found to work better than anything against depression. But even today it isn't marketed, unlike hundreds of antidepressants known to have worse secondary effects and be less effective. Reason? Some people might have fun with it.