only reason i put effort in this is you mention that recreational drug users are junkies....
so im guessing you have "Never" taken a sip of a pepsi or coke? or taken a bite of some chocolate or packet of crisps? and totaly dident ever have a slice of pizza, and dont even get me started on coffee and alcholic beverages. all these are recreational LEGAL drugs...
pepsi has more addictive charactoristics in 1 can then 3 bowls of cannabis... people crave caffine, people crave sugar.. People crave junk food and dont tell em in the 20 somthing years you lived, you never craved a packet of tatyos... thats what we call a mental craving. weed has a simular craving, not based on a feeling of Need but more of a "jee i could go for a joint right now, oh well" unlike alchol or other posible abusive drugs such as, meth, coke, heroin and crack and what ever... and thats only the illigal stuff, think about the legal medical drugs such as "retlin, pain killers, cough medison and the full list of physical and mental "Dependence" of these.
you should try it some time, probly understand it more from first person prespective...