Not sure how anyone can disagree with the statements
1) the demographics of the news media skew upper-middle class, white and male.
2) Your socioeconomic background has an affect on your experience of the world and your politics.
3) Your experience has an impact on your politics, affects what you deem newsworthy, and influences the way in which you analyse events.
It's clear that the media is completely out of touch with the average person on the street and that many commentators have no insight into, or interest in, the lives of ordinary people, much less the lives of marginalised groups. Generally speaking, the media has huge blindspots regarding poverty, inequality, the experience of disadvantaged groups and non-metropolitan Britain in general. The reason the media didn't see Brexit coming is because they had no understanding of why people in post-industrial areas which have been left to rot under various governments over the course of 40 years might not trust politicians telling them how to vote. The reason they didn't see Grenfell coming despite community groups and the left going on about dangerous and poor quality housing for decades is because they'd never lived in or visited a place like it so they couldn't believe they existed and wrote it off as the left getting overexcited over nothing.
A recent example relevant to this thread is when Corbyn raised buses in a PMQs and the media had a go at him for being out of touch with reality and raising such a niche topic. In reality, buses are the most relied-on form of public transport across the country and services are generally more-expensive and less-reliable then ever and it's a huge issue outside of the big cities.