Actually part of what you say here is quite on topic. People do demonize opiate use....
Funny you say that since literally last night a friend and I spoke about (basically you're entire post .... lol ....creepy). And to a degree I really do feel like laughing what I hear those kinds (a drug being demonise, having a specific reputation, etc) and admittedly by the lay but those comments.
No drug has any form of positive nor negative "traits" (for the lack of a better word atm). Drug which are "bad" or "good" just simply don't exist! (without turning this into a psych discussion. Essentially what people are doing there are anthropomorphism something(s) which do not obtain these traits!
for other than pain at specific doses--literally, for no other reason than citing its addictive potential. I really don't think people, even on blue light, can appreciate just how much of a fallacy it is to not even consider opiates for use in psychiatry because of their reputation--which, I admit, is somewhat earned, but which shouldn't automatically lead to throwing away this extraordinarily effective drug class down the drain in the face of people who could achieve a net benefit.
Again, I do agree with your post. For someone (company/research/uni's/etc) to essentially limit, or in the least limit the rate of (any) science progression due to "arguments" (and I used that term very lightly) such as,
opiates do indeed exhibit highly addictive qualities (with this alone imo fuel rumours and much of it's negative stigma)
Regardless, the reasons given why opiates (as an off-label used, research, etc) - such as any perceived/real stigma/reputation aren't legitimate excuses at all tbh! One would hope that
specially everyone posting here! (all of whom should be highly educated enough to know how far "off-label"-use prescriptions can be taken, have general understandings of drug processes (re: research, trials, funding, blah blah), associated laws. etc. Surely, being an educated person that if they
truly believe that opiate modalities for depression honestly will not work, there should be no arguments/worries since they believe they already know the results!
To use another recent yet similar situations going re medicinal marijuana. Again, it seems the biggest problem is people's (incorrect) assumption of what "weed" is! I would literally place bets on, if marijuana(/extracted and purification process) was discovered today, and was immediately considered to have medicinal uses and was utilised as such, no one would think twice about taking a cannabinoid pills when prescribed by a professional (obviously as per indicated).
...when I brought up benzodiazepines as collaterally dangerous in a similar manner, he claimed that the dangers of benzodiazepines are vastly overrated. How about that? Any agreements? If so, then benzos might be a decent replacement for opiates in the anxiety department.
An entirely new though as this one could be created to discuses what you've mentioned about tbh! However (and I admit I'm no expert) after the first benzo - initially synthetically (accidentally!) created in an attempt to create better (around the '50 afaik)- was discovery initially as a in an attempt to create better tranquilizers. As with most of those "intermediate","accident-resulted" drugs, it was documented and neatly filed away for quite a number of years. Until another chemist comes along, dusts the book of and - out of curiosity maybe? lol - chose that to study further, rat assay, the usual (this was in the '70 i reckon) and pretty much it became high demand.
The
real (well I believe it

) reason it went like crazy and before this, the closet alternatives were barbiturate and they were often (afaik) reluctantly prescribed (for a multitude of reasons). If not (reluctantly prescribed then) more toward the end of their time (late 1880's to 1950 give or take) . At which point, given an option between a bard v benzo, the benzo will always(99%

) win out especially now days! The variants possible for barbituates
do still have their place and indication, however due to many, many reasons, benzo's are used