Journalism has all the problems of being a shrinking high status low income industry. Living in NYC I know a few journalists, and if you scratch below the surface on many of their bios they are quite often from wealth of one form or another. At least enough wealth to subsidize them living in an expensive NYC zipcode on awful starting pay with low growth and ceiling.

So it really is quite a monoculture. 20 years ago they all lived in UWS, now it's somewhere between Park Slope and North Brooklyn. Ever noticed how many local color stories used to be UWS focussed and are now Brooklyn? A lot of trends pieces are "stuff I noticed in my friends group" type of depth, and they all have the same friends groups. They literally don't know what they don't know.