The position I think I can most simplify my beliefs in to is "it should have taken you longer to write something than the person receiving it is going to spend reading it."
That position still fits your scenario, where if they're not actually caring enough to read it then you don't need to care enough to write it, but for something like this targeted at a technical audience it's a higher bar.
Also of course the accuracy of the writing is relevant in both cases, which is something LLMs are absolutely worse than humans at, as noted in some of the comments here this article had the LLM hallucinate the existence of macOS 25 which is a mistake no human would have made while writing such an article entirely by hand.
That position still fits your scenario, where if they're not actually caring enough to read it then you don't need to care enough to write it, but for something like this targeted at a technical audience it's a higher bar.
Also of course the accuracy of the writing is relevant in both cases, which is something LLMs are absolutely worse than humans at, as noted in some of the comments here this article had the LLM hallucinate the existence of macOS 25 which is a mistake no human would have made while writing such an article entirely by hand.