although rather dated (35 years ago),leads me to agree with their opinion that pot is not addictive.
However, the ritual of smoking pot in group situations, can be a hard habit to break.
Not participating can mark one as a sort of "backslider" from the pot culture.
In my case, stopping pot meant havihg to find a new set of friends, because it was impossible to stay in my former circle without continually being pressured to participate.