Addendum: A significant exception to that rule is when the journalist themselves is the source or an involved party in the story, e.g. when Jeffrey Goldberg from the Atlantic was included in a Signal chat with US government officials discussing war plans: https://www.theatlantic.com/politics/archive/2025/03/trump-a...

In such cases, the journalist likely will publish raw data/screenshots, since they're functioning both as the source and the reporter.