"marijuana dependence" - there is no chemical dependence with cannabis. None. Nada. Zilch.
> smoking tobacco was just because of inhaling smoke
The danger is inhaling burnt plant matter along with the slew of crap companies spray on tobacco. Straight tobacco has a VERY DIFFERENT taste and "cleaner". Still not great for you.
And most cannabis is vaped these days. In that way, it's with the THC oil with terpenes. And that profile is very different than burning plant matter, since in a vape it's vaporized oils (and some metal from the ceramic/metal filament).