It's not. I just wrote the comment because it was relevant to recent events for me.
I started practicing writing non-fiction recently as a hobby. While writing non-fiction, I noticed that being concise 100% of the time is not good. Sometimes I did want to write concisely, other times I did not. When I was reading my writing back, I realized how deliberate you had to be about how much or how little detail you gave. It felt like a lot of rules of English went out the window. 100% grammatical correctness was not necessary if it meant better flow or pacing. Unnecessary details and repetition became tools instead of taboo. The whole experience felt like I was painting with words and as long as I can give the reader the experience I want nothing else mattered.
It really highlighted the contrast between fiction and non-fiction writing. It was an eye-opening experience.