It's actually funny that you should raise that one, because it's generally agreed upon in the writing community to not be very good advice. I hesitate to call it terrible, but the modern advice in general is to use "said" and avoid too many alternates, as they call attention to the word itself over the dialogue, and frequently add nothing that you cannot achieve through story beats or dialogue style.This is, I think, where I want to tread a bit more delicately. Let's be upfront that I never insinuated that using longer or shorter sentences said anything about the quality of writing: introducing that argument feels like a strawman. Advising on the purpose and effect a long sentence has on a reader does not necessarily mean using them or not means it is emblematic of bad writing. In fact, most writers will use both long and short sentences, because they achieve different effects. Like, grab a book, any book, so long as it has an action scene. Compare the action scene to another one, and then particularly the length of sentences for action segments.

You'll note they almost always use shorter sentences than otherwise.

Do you not suppose there's a reason for that?

For the rest of your post, it kind of feels like you're not really directing it at me. My argument has never been to shove writing feedback down everyone's throats, so I don't get why you're so up in arms over that. I understand you feel writing is subjective and it'd be way too difficult to provide feedback, but there is a profession that deals with it entirely, and I wouldn't feel comfortable putting editors down as a bunch of people who do nothing but have opinions about writing.