You are comparing people that used crack at least once in their lifetime with people who drink reasonable amounts of alcohol for decades. Then this comparison became basis for comparing effect of crack on people with the effect of alcohol in people. This is disingenuous.
I'm not sure that's the comparison that's being made. At least the phrasing suggests they think it's more ongoing than "at least once".
> If you're looking for people who use crack recreationally
That seems to suggest something more similar to consuming "reasonable amounts" for an extended period. I personally don't know how common that would be (since I don't tend to hang around kitchens in restaurants) but it does sound rather different from "people that used crack at least once in their lifetime".
I can agree with that and I certainly don't care what people do with their lives as long as they don't harm others.
However there are people consuming a beer each evening for decades and they are totally fine.. I doubt that is possible with crack.