A headline is written to attract attention, and the person who wrote it is often not the person who reported or researched the underlying story. Following the expert quoted within a piece, rather than the framing chosen by whoever wrote the headline above it, tends to give a more accurate sense of what is actually known.
Experts tend to speak in qualified, careful language, acknowledging uncertainty and limits, which rarely survives the trip into a punchy headline built to be clicked rather than read carefully. Reading past the headline to find what the actual expert said, in their own words, is one of the more reliable corrections available to a careful reader.
Over time, this habit builds a mental list of voices worth returning to directly, people whose caution and precision have proven reliable, which becomes a shortcut of its own: a reader who knows whose account to trust does not need to fact-check every headline from first principles each time.