You argue semantics. I mentioned two prescription drugs of the same class that are harmful, but I'm sure if you looked you could find other examples. Also, you argue that just because weed is smoked less doesn't make it any less dangerous, that argument is faulty because it is MEANT to be smoked less than cigarettes, and therefore causes less damage and harm for our healthcare system.
Anything can be harmful if used in copious amounts, even water. The average person does not smoke a pack of joints per day.
Also, it IS in the best interest for the drug companies to keep people on the drugs that they are selling, that is common sense. It is why you so many doctors prescribe long term high dosages for certain drugs, including the Benzodiazepine's which includes Klonopin, and Xanax and which makes people highly dependent. Trust me, I used to, and friends used to take the stuff. It's given out like candy to people with any anxiety these days. Those drugs can also cause LIFELONG dependence. The antidepressants, AKA SSRI's are not truly addicting like the Benzo's but it is still in the companies best interest to keep people on the stuff. I'm not saying these drugs are all bad, but the way they are prescribed and how just about anyone can obtain them is bad.
Klonopin is even sold on the street for about 2-5 per pill.
Don't even get me started on how dangerous alcohol is when not used in moderation. My whole point is weed is much safer for both society and to the person than many legal drugs that people take, and there is little reason for it to be illegal if the other regulated drugs can be obtained so easily.