I think it has a tendency to make people procrastinate if they overdo it, and if they get sort of "hooked." (Even if it's mostly psychological addiction not physical) That's certainly my experience as well.

IMO it's not meant to be used/smoked more often than once or twice per month, optimally. If one is afraid of one's health and state of mind and so on. People are different though and there are those who can smoke a lot and not get too much affected by it.