And for everyone of them there is thousands who only smoke pot. Do you really think people who are offered stuff like Heroin and Meth think to themselves "Well hey I've tried pot why not try this, it can't be that bad, hell I bet it's better!" Or that they get bored of weed and think hey why not try smack? I know a few people who started taking Valium and then moved onto Heroin, does that mean doctors should stop prescribing Valium?
It is by definition a drug. That can't be argued. Can you provide a source for your fun fact? Heroin changes the way the brain functions but I've never heard that it makes your brain bleed. I'm not disputing your fact but would just like to read the article you got the fact from. It's just you know, you get Heroin aka Diamorphine in hospitals in some countries, if it caused brain bleeding I doubt they'd administer it to patients.