Absinth is also a medicinal herb some people abuse. You cannot categorize medicinal herbs as drugs, that is just not right.
Opium is also taken from a plant and highly addictive, and harmful. But it cannot be classified as a medicinal herb because it is a plant extract. Still, people who use opium as it is, without chemical alteration can live a long life as long as a normal human being of the same conditions. Same goes for Coca, when chemically altered, it is harmful, otherwise, just a herb. Luckily, they do not chemically alter Cannabis, otherwise it would also be labeled as a harmful narcotic. But, Coca and Opium can be addictive if used continuously. Cannabis is not addictive at all, you can get high a whole year straight and stop cannabis cod turkey!
I have been high on cannabis (Ganja) the whole year last year, and didn't even touch it this year. I have no problem at all, (other than that special time of the month

.
Any of you saying Cannabis is any bad; can you point out any death directly caused consuming pure Cannabis.
There are much worse chemically synthesized addictive narcotics, such as speed, meth or lsd that are addictive and also harmful.