Alcoholism is a much greater problem than cannabis. Let's face it--people drink to get "high", no matter what the purveyors and users of alcohol say. Of course, the proponents of alcohol say otherwise, but facts are even one drink puts a person in a partial mind-altered state.
Alcohol tends to bring out aggressive tendencies in users. Cannabis users generally "mellow out". Alcohol users subject themselves to possible overdose and even death. Yes, being drunk is overdosing on alcohol. As to cannabis, there is not one documented death due to ingestion of cannabis. . .ingest too much and one simply "nods out" (falls asleep). Which is worse?