I take it you've never spoken to a journalist.
Their job is not to present the findings in a balanced way. It is to present sharp, punchy, telegraphic prose that grabs a reader's interest and holds it long enough to justify the cost of the adjacent advertising.
Oh! And they need it done by 4pm sharp.
Conversations can go along these lines:
Journo: "What does the study say, Doctor Bloggs? Will people who sit more die sooner?"
Dr Bloggs, PhD: "Well it's too early to say that for sure.
It's only a preliminary result. There's no full randomised trial, it's a meta-study based on a few dozen other studies. "
Journo: "But what was the conclusion? Does sitting shorten life?"
Dr Bloggs, PhD: "Well when the researchers controlled for known risk factors like age, heredity and so forth they found a correlation between sedentary time and lifespan. But it's only an early result, much more work has to be done."
Journo: "What does that mean in lay terms?"
Dr Bloggs, PhD: "It means that based on this study, people who sit for longer had a shorter life expectancy."
Journo: "Would you say that means that they died sooner than they otherwise would have?"
Dr Bloggs, PhD: "Sure, that's one way to put it."
Next day:
SITTING IS KILLING YOU SAYS DOC
Prominent local medical scientist Dr Blogg said yesterday that people who sit too much "die sooner".
"People who sit [have] a shorter life expectancy", he said.
His comments come after the publication of a report...
At no point has the journalist strictly lied about what Dr Bloggs said. He just left out that tedious fluffy sandbagging scientists always insist on and cut to the heart of the matter. The journalist here can source every word in the report.
Everything you ever say to a journalist can and will be published.
They are not your friends. They are not normal people who keep normal confidences. They do not observe social niceties or politeness in conveying what you said.
They will print only what makes for an interesting story. And that will only rarely be what you, the source, had in mind when you spoke to them.