I know what you're saying but I truly think for most people it's simply that they're overthinking it. They think every single thing needs to be in the description, with references explained and sourced and whatnot. That does sound exhausting. And I have written a handful of descriptions like that for pictures where I thought the details were interesting enough to justify the effort. But really, a simple "The thirteenth Doctor and Rose Tyler embracing and deeply kissing" is already very sufficient in most cases (add "standing on an asteroid in front of a field of glittering stars - digital colour painting" if you have the spoons). So imho it's better to educate them and encourage short, concise descriptions than to give in to the slop.