Those who have good information must keep it to themselves and appear "biased" because they do not want to betray the people who shared it. Those who do not have that information are biased by ignorance.
The best information is rarely written down or published anywhere. You still get it by talking in small, private groups with people who trust you.
You can learn a lot sitting at home with your computer, but you miss half of the half of how the world works.