Over the last 5 years or so I've been working on making my writing more direct. Less "five dollar words" and complex sentences. My natural voice is... prolix.
But great prose from great authors can compress a lot of meaning without any of that stuff. They can show restraint.
If I had to guess, no capitalization looks visually unassuming and off-the-cuff. Humble. Maybe it deflects some criticism, maybe it just helps with visual recognition that a piece of writing is more of a text message than an essay, so don't think too hard about it.
It’s okay to say ‘this was too long’. Prolix???