You will be much more effective if you simply try to enjoy the conversation than trying to call out people for having "dangerous opinions".
There are times when people can have valid, personal opinions and times when there's just objective reality. Some people these days say that their opinion is that the 2020 election was stolen. That's not a valid opinion - it's just wrong. Saying that hangovers make alcohol self-regulating when >10M people in the US are alcoholics (for whom it is, as a point of fact, untrue that alcohol is a self-regulating substance) is not a valid opinion - it's a misunderstanding of reality.
As someone who knows people who have been very severely negatively affected by alcoholism, I do not enjoy conversations with people who make points about alcohol that are totally uninformed and suggest that we should base policy around those uninformed thoughts.
No offense to you, but who named you the arbitrator of "valid opinions"? I doubt you are that arrogant in person, but you sure are coming off that way.
Either we should accept a certain threshold of danger around drug use and allow all drugs under that threshold to be used (with appropriate regulation), or we should not accept the use of dangerous drugs and should outlaw them.
Right now, US drug policy is that a fairly dangerous drug (alcohol) is not legal, while other clearly less dangerous drugs (marijuana, most hallucinogens, MDMA, etc.) are not legal. It should be changed to be a rational policy in which everything less dangerous than alcohol is legal or a policy in which alcohol is not legal.
I’m pretty pro legalization, I think it’s probably best handled at the cultural level, but until society matures there is going to a fair bit of collateral damage and I think we should be honest about that.
* it’s a generalization… obviously it doesn’t work out this way for everyone.
But we have had a coherent policy around drugs in the US:
1. Identify a potential issue with a particular drug;
2. Investigate the issues and examine the evidence;
3. Create a set of policy solutions to address the issues;
4. Pick the least effective, most harmful policy solution and implement that.
5. Profit!
All you have to do is look at all the major drug legislation over the past 130 years or so to see that such is, in fact, the case.
I'm convinced the only reason alcohol is legal is because it is culturally embedded. If it were being introduced anew, it would be prohibited. Its far worse than most illegal drugs.
Alcohol has a complex set of biochemical effects, but note that part of the issue is that it's similar to opiates, i.e. it triggers the release of an endorphin-like molecule that people get addicted to in the same way as with morphine or heroin.
I still don't think alcohol should be made illegal, but in terms of long-term medical effects, it's certainly more dangerous than cannabis/THC and psychedelic drugs like mushrooms/psilocybine. It really belongs in the same class with amphetamines, cocaine, benzos, and opiates.
Alcohol is very bad for your health and it is a horrible thing to be addicted to but it is not very addictive.
We tried that[0] in the United States, and it was an unmitigated disaster.
[0] https://constitution.congress.gov/constitution/amendment-18/
I think alcohol is a bad example as alcohol for most people has a way of punishing abuse on its own and quickly thereby maintaining a tight association between the high and the hangover. The aversion to the hangover means that for most people it's a self correcting problem. Most other drugs don't come with this and the association between the high and negative consequences are more remote and infrequent.
I think alcohol, despite the obvious and extensive damage it causes, is a great training drug that teaches most people moderation through first hand experience and encourages caution with other drugs.
Using alcohol as an example kinda makes the case for prohibiting alcohol as opposed to legalizing other drugs.