When you can't sleep because of a hangover, you excoriate yourself for drinking too much.
When it's jet lag, you're up at 4:30 dealing with plainer, less changeable facts, like:
I'm getting jowls. (Which absolutely sucks, there being no such things as "love jowls" or "laugh jowls.")
I talk far too much, and for the worst imaginable reason. (Because I worry that if I don't talk, you won't come up with anything to say and we'll be stuck with no one talking. Jesus, what an asshole!)
Yet another benefit of drinking. It takes your mind off your real faults.