It contains more tar than tobacco. While it’s not chainsmoked in the same manner as cigarettes, it still does a number on the lungs.
So depending on how often one smokes marijuana, one can end up just as bad, even worse, than a person who smokes tobacco. Since cigarettes carry a risk of death over the years, so too does marijuana. The difference is, marijuana being less addictive than tobacco, people are far more likely to stop smoking marijuana before it kills them.
Yep!
...and your other "assumptions" are based on what? A does not equal B... just because someone posits it!