Have been noticing this exact problem with the FFG Star Wars rule sets.
Have you seen how thick those books are? Edge of the Empire is 445 pages. Age of Rebellion is 460. And this is full-size 8.5x11 pages with tiny, miniscule font. The font is so small I can hardly read it if I'm wearing my contact lenses rather than glasses (yeah, yeah, middle age and needing bifocals or reading glasses, whatever

).
But the problem is exactly as described. There's sooooooo much filler prose, it's crazy. Ideas that could easily be explained in 2 sentences and a simple visual or graphic get sprawled across 4 or 5 paragraphs or more.
By contrast, one of the absolute best examples of tight, concise RPG prose is Ironsworn. The book is 280 pages, but it's a 6x8 inch page size, with very large font with tons of white space and liberal use of headings and dividers to conceptually "chunk" content together. It's so easily digestible, and greatly facilitated by having a stellar visual layout and document design.