People would be surprised (or maybe not) how often online editors just publish stuff without pressing writers the way traditional copy/line editors would have years ago.
You're assuming an editor of any sort is reading it. Lots of times copy is dumped onto a web producer's lap and they're told "hey, deal with it." I was a copy editor who had slotted a little before jumping to the web desk, so I had some experience — a lot of web producers are 24-year-olds with no experience, though. And no, managers don't always make themselves available.
I think the Post is better than most with 24/7 staffing on its "multiplatform desk," but still.