Вот этот текст нужно распечатать и на стену повесить:

"Scientist says" - okay, that's not very useful, which scientist? What science? What research? What's it being backed by? What money flows are behind it? What's the conflict of interest report?

Any time a headline says "scientists say" that's just some sort of crappy marketing signal, not actually a useful thing to put in your headline because those words in that way lost their value.

It used to be that a scientist was someone who was an actual scientist, applying scientific principles and having an accredited master or maybe even doctorate. And then it also wasn't "they said" but "published" or "reported" or "found evidence of".