The "Dave Grohl" guy looked a lot like Tom Hulce to me (Steve Martin's ne'er-do-brother in "Parenthood").

The dreaded pop-psych explanations are often (and obviously) functioning as metaphors for more social/philosophical/political commentary. Not so much in the examples given here, of course. But a horror that avoids pop-psych explanations is not necessarily better than those that embrace them.

"You are NEVER ready to see Fabio."  PFT, in a better bit.