Doesn’t this just reinforce your echo chamber? Your “editor” only gives you stuff you want to see not the stuff you need or should see.

And once you empower someone to gate or filter your access to information, what’s stopping them from treating you like the product for a better paying customer, like today?

You have hit the nail on the head there! The point in the book was that depending on your editor, you were essentially living in different realities.

There was the east and west coasts, and then there was Ameristan (or something I can't remember exactly) in between, which was fundamentalist