The right to suicide is also a terrible belief. What about all the teenagers who commit suicide for extremely petty things, (my girlfriend broke up with me, my dog died, I got an F, nobody liked me today). Normally I could call the police, who will have the clearence to come in, arrest, detain, and rehabilitate or help that teen or adult. Now under your laws, I could call the police but they could not do anything about it and now I'm short one friend. Additionally you have people who overdose without knowing the consequence, and people who become depressed over a large event that doesn't warrant death (divorce, family/friend death,, or presidential election) the latter going off an illogical idea that "This is the only way out"
I agree with rec drugs, not hard, but certainly pot.
I don't mean to say the government knows best, but the people in it are more educated than the common man and there are scientists who work for the government in all fields.
Prostitition is already legal in Nevada, and there hasn't been a single case of HIV from legal prostitition activity in that state. The workers are also safe.
With prohibition come black market crime and exploitation, while legalization would bring regulation and unionization.