Outside of intensely physically addictive substances such as opiates and methamphetimines, there's nothing more dangerous than alcohol simply because of the availability and cultural acceptance. You can be a hardcore alcoholic as long as you're functional and almost no one will say jack about it.

> how much more dangerous alcohol can be than marijuana or many other drugs.

That may be true but is irrelevant. The original claim was that someone talking about the dangers of marijuana while drinking is an idiot.

My claim is that talking about one says nothing about their knowledge of the other since they are different things. I can talk about the dangers of bear attacks while driving a car. I can talk about the dangers of flying while using a ladder.

That doesn't make me a hypocrite, it just means I'm not spending every waking moment sorting my activities and discussion points by aggregate danger level.

It doesn't make you a hypocrite, but using your example, it would make you an idiot armchair pundit, unaware of your surroundings, or the comedic irony in which your statements are now grounded. Which is more in-line with the original point, I think.

Not that I'm saying you're any of those things, mind you, but your analogy was fairly flawed. :)