Perhaps they are useful for some diseases, but dosage is difficult to observe when you want more. With legalization, it is unlikely that they will be used strictly for their intended purpose, it is better not to take risks.
And let more people die because of alcohol.
Genius.
Because of alcohol, not many die because of drugs. Alcohol is less dangerous than drugs, although it should also be attributed to banned substances.
Who told you that alcohol is less dangerous, when compared to drugs? Compare the number of people who die off liver cirrhosis to the number who die from drug overdose. The number of deaths from the first cause is hundreds of times greater than those from the second. And if we legalize the drugs, and make them available through regulated shops, then the number of deaths from overdose will decline further.
Do not forget that your statistics are not taken into account death from AIDS, murder with the robberies committed by drug addicts to a traffic accident. I think that if you consider these factors then the victory will be for the drug.