They found that smoking tobacco was a greater hazard than smoking marijuana, and that the dangers of drinking alcohol and smoking marijuana were about the same. Their studies indicated that regular use of marijuana did not lead to a higher mortality rate. The DEA has also admitted that marijuana does not pose a very big health risk. Drinking water is relatively harmless until you drink too much, upset your electrolyte balance, and suffer death. Driving a car is relatively harmless until you drive into a tree.
Nothing is safe for all people all the time.
Marijuana, like anything else, will pose health risks when abused or used irresponsibly. Virtually anything may be addictive. Housework may be addictive, but to say that it is would be ludicrous. To millions of people like me, housework is anything but addictive. Roller-skating may be addictive.