That's perfectly valid. With the gold thing, I was referring to the fact that people say it verbatim as I typed, (seemingly) every time. IMO it feels less genuine when someone doesn't thank another using their own words.
By the way, your respectful disagreement is another reason why I like Lemmy. Courtesy seems to be more common over here :D
Yeah, I'm aware that all or numbers and models are, at best, representative of what is really happening. That's what I love about the limits of our knowledge: there always something more to learn.
I wonder how spacetime around a black hole's ergosphere is represented by the "flow" analogy. Maybe like water swirling around a drain?