You're describing a robot. People don't work like that.
I believe this is sadly similar to doping. As soon as the first journalists started becoming "more entertaining to read" with salacious details or moralistic rhetoric, other outlets had to do it too to not lose readers and keep up.
The better question is why people respond more to Fox News than proper, grounded publications. Until we figure that out, said publications will either maintain a sense of duty and impartiality and inevitably go under, or just start churning out the same clickbait trash to keep the lights on.