I would consider it the worst or most powerful drug in terms of access, addiction and intoxication. It's literally poison, and what it can do to an individual I feel is unlike most other illicit substances.
Alcohol is only a problem because some people do it so much. Alot of people I know drink all the time-- like several times a week. They could look a little younger but generally have passable bills of health.
Also we have to question who's behind this statement. For all we know it's the PRC starting a new teetotalling campaign in their land.
What about meth, fentanyl or oxycotin? (to name just a few)
I would consider these more literal poison by comparison to alcohol by any objective manner. If they are all legal, then access/addiction/intoxication are not even close to compare to alcohol, they are all far worse.
They're not poison though based on they way they work with neuroreceptors whereas alcohol limits neurotransmission all together. None of them are good, and in excess they're both terrible.