I’m not sure where but I know it was a point of contention that they made up over. There was a moment where tenacious D was brought onto stage as Jack Black and that pissed/hurt him a lot. So what they are saying is kinda of true but they’ve already talked and made up so why they are bringing it up as a gotcha is a bit strange.
There plenty of things being a hobby musician that my community does but the one lesser talked about one is Musicians will makes plans and 90% of the time there is no follow through. “We will be in touch” “we should do something” “you would be good for…” “give me your number” “email me” all essentially go nowhere. The only other people who might be less reliable are contractors doing home improvement.