This is not always malicious or deliberate. It could be an attempt to draw more clicks with an exciting or dramatic headline, or it could just be a reporter who is not an expert on that topic misunderstanding the research. Because news articles tend to be shorter and written for a general audience, their summaries of research studies will always be simplified.
I notice this very often when reading articles authors often exaggerate the information they write about. Though it is not always misinformation sometimes it’s just clickbait meant to attract readers, as the text states. I also like that the passage points out that news articles are short and written for a general audience, because this is very true and gets many readers, including me. As in my high school cerea I would always use articles that were very short and articles that had very out there headliners for my sources.