From what I’ve seen of the tech, “assist” is the operant word here. It’s more like those article summary bots or a template fill-in-the-blank rather than something like GPT-2 that’s generating entirely novel phrases. A human still has to go in and make the text flow, correct things that don’t make sense, add good hooks, and (of course) an enticing title. The text isn’t “mostly written” by a bot - it’s still text that a human wrote, although it may have been summarized or had details populated by a bot.
That’s the sort of fill-in-the-blank thing I’m talking about. It does data ingest from a very structured source (sports scores, financial reports, weather) and populates a pre-written template. But… the article is dull as dirt (so you’d only use it as a starting point, or for relatively low-value content), and it only works for things with very structured data. This almost certainly isn’t the case with the OP article, or most reporting you read on a day-to-day basis.