I don't buy it.
Corporate media have always had a heavy thumb on the editorial scale ever since the time when the newspaper was king. Worse yet we are now in an era where several media corporations exist to push the same narrative.
It is so bad that 'Tubers have repeatedly shown mashups where one "source" after another parrot exactly the same lines on a given topic or event.
If one has already fully bought in to the narrative he will naturally bobblehead along and praise their imprimatur, plug both ears, and chant "La La La!" This is bowing to literal authoritarianism.
Corporate media exists for profit. It won't do anything that overtly jeopardizes it's income. At the same time, editors are human beings with preferences, opinions, and likes. This is why, in the UK, if you lean to the right on politics, you read the likes of the Daily Mail. If you lean to the left, you most likely buy The Daily Mirror. That's because the editorial control pushes things in that direction. It's deliberate, it's playing to their established customer base.
But here's the kicker - can you name a single so called "alternative media" source that isn't the very same thing? Which of them lack a bias? Which of them isn't concerned with making money? Which of them, on the net, aren't primarily after clicks (popularity)? It's the same thing, and it can't be erased.
As for repeating things - that most often arises when a news service gets lazy and repeats what comes across the wire via the likes of Reuters. So they simply copy and paste the Reuters text. But then again, consider this - where does the alternative media get it's information? Do they have journalists going out to record events? Do they have a network of people looking/writing content? Nope. 99% of them are simply spinning what they have seen on traditional media, or they're using the very same Reuters feed. It's one big circle-jerk.
As to your final line - I'm sorry, but how much media do you watch that you don't already agree with? If you're on the right, how often do you watch left leaning media? The same goes the other way. You know why readers of the Daily Mirror like to read it? Because they agree with most of what it publishes. Same with the Daily Mail. If you're left leaning, you're not likely watching Fox news every night. How many right wingers choose to watch MSN every night?
In other words, we like our biases. We're a slave to them.