Not all drugs are involuntary. People voluntarily use alcohol, nicotine, and caffeine for example.Agreed. I think the closest real-world analogue to Charm spells is being involuntarily drugged so that your judgement is impaired and you would do things that you would not normally do. So while it is bad, I don't think it is as bad as torture or death.
Bless and heroism are enchantments as well.