There job is professional advertisement. Nothing more, nothing less.
Games that get big advertisement on there site will generally score higher on reviews because not doing so will make the publisher take away the privilages they give them.
News we get are not done with any investigation or research, its just handed over to them by the publisher. Sites that usually get exclusive interviews, announcments, previews are usually ones that will give what the publisher what they want. High scores, plenty of space on there site, advertisement.
No real serious issues are bought up in the gaming media, mistreated staff, overworked sucicidal factory workers who make these systems, minerals to make the systems are bought from voilent regimes in africa, over spending and higher budgets assuring only the bigger business's will be the main presence on the home and portable systems, the uprising of smaller developers through smaller budgets and means.
Because those things get in the way of important discussions like ""Who has the best graphics?"" or ""Casual gaming vs Hardcore gaming.""
