@BlueIris I think Queensryche best expressed the problem with accepting that US corporate media brainwashes people in their 1988 song "Revolution Calling"
"I used to trust the media to tell me the truth / tell us the truth / but now I see the payoffs everywhere I look / Who do you trust when everyone's a crook?"
https://www.youtube.com/watch?v=CNdOsL4Xe7Q
Nobody wants to ask that question, because the only reasonable answer is too frightening.
@starbreaker I think it's more a case of training. Unless you've actually worked in the media, you're likely to accept their much-proclaimed lack of bias as fact. It isn't, and never has been. They're first obligation is to their advertisers, and then comes the personal biases of the editorial board and staff.