There is no evidence for that.
The evidence is that drug addiction has more to do with social issues than chemistry.
The book https://chasingthescream.com/ is a good read on this issue.
And just to admit:
Alcohol and tobacco both have much higher burdens in terms of disability-adjusted life years.
For alcohol see this plot: https://ourworldindata.org/grapher/dalys-from-alcohol-use-di...
For other drugs of abuse (excluding tobacco) see
Raw opium is much harder to kill yourself with.
For an addict herion overdose is almost unknown. True. It does not suppress the breathing reflex like morphine and synthetics.
Putting powerful deadly drugs in an easy to swallow pill is not a sensible approach to recreational drugs
Opium lounges are a much better idea. I am keen on those.
Having drugs that don't kill people before they grow out of them would be a good thing.
And, if even Michael Jackson or Prince can die of an overdose, there is something very, very wrong with our entire system.
Wrong