Of all the reasons to post about the ills of alcohol is not being able to handle it really at the top of all the reasons.Two truisms for ya.
Thou doth protest too much.
If it walks like a duck...
Nobody gives this much of a **** about an issue without having some kind of personal problem with it.
I don't disagree with this. No doubt he is passionate about it. In my experience the people who can't handle alcohol just keep acting like they can. Maybe he heard a sermon? Maybe he's seen loved ones ruin their lives? Maybe he's always been a teetotaler. Recovering drunk? That's the most likely inspiration?