[Sankozi]

You are contradicting yourself: either presentation is not important so LLM use does not matter (as long as core message is still there), or it is important and and LLM can change how the message is received (by improving presentation or making it worse).

[Eisenstein]

I don't see a contradiction. What they are saying is that no amount of non-ambiguous presentation can make poor content acceptable. They never said the presentation was meaningless.

Example: A friend has died and consolation is given. No amount of consolation makes the death a good thing for you, but there is still a difference in how that consolation is presented to you.