I'm not saying it's an argument for God, I'm saying more that it's as logically poor and useless as 'God' as an answer to the question. "Why are my parents white?" "if they weren't, you wouldn't be asking why they are white". "Why am I typing with my fingers?" "if you typed with your toes you wouldn't be asking why you type with your fingers". It's not an answer, it's a wordplay loopback which takes up the place of an answer and blocks anything else from going there.

> "Well, it explains why the universe is fine-tuned, if you buy the argument."

No, it observes that the universe is fine tuned but doesn't explain anything. How the parameters could possibly vary (how could the 'charge on an electron' concievably be tuned across the entire Universe, by any means, where is the tuning knob?), how the tuning actually happened - what process, where the multiverse universes could physically or temporally be, how they could arise, why they arise with different parameters, nothing. Worse, it suggests knowledge that the parameters can and do vary, knowledge of a multiverse or a tuning process applying to one universe, when that knowledge doesn't exist. It reassures the existence of a larger more powerful unknowable thing behind the scenes which makes this universe perfect for humans (cough Godlike cough).

> "Yep, just like any other answer to the question, since it's a metaphysical question rather than a scientific one."

"We don't know" predicts nothing, but doesn't pretend to be an answer, doesn't pretend to be more than it is.

> "It offers an explanation."

It placates (or frustrates) with a non-explanation. It's feel-good sugar when you wanted nutrition.

> "closes the book on any further questions / No more than any other answer does."

More than "We don't know" does.