It's not that easy. Filtered news is addictive. It's like children's breakfast cereal with just the candy.

It validates your world views, makes you feel smart for agreeing with all the other "smart" people. I wouldn't be surprised to hear it triggers the same positive feedback loops as other psychologically addictive things.

Once you're thoroughly filtered and addicted, opinions that disagree with your bubbled opinions are painful to read. They feel like agressions.