I kinda doubt that quality-assertion of "Atlantic-worthy." While I have no doubt such articles are written solely as training data, I'd expect their quality to be much less than the real thing, since there's no public to critique them, probably little reputational risk for errors, and no professional ethics to uphold. Even if professional journalists were hired to do the work, I'd expect them to start phoning it in pretty quick, and skimp on fact-checking especially.