This article's not about alcohol. Can you ever talk about drugs without mentioning it? I know you can't, but seriously.
Intoxication is not the same between all drugs. If they were, nobody would use different ones. Comparing them like you do is so damn stupid.
No, it makes perfect sense in the context of A CA Guy's pro-WOD argument, "drugged people violate the rights of employers and employees regarding their personal safety and liability risks to all around them", since the same statement is true for the drug alcohol.