People really need to understand how journalism works as a business model. When you only consume news that reinforces your beliefs, that creates an incentive to produce news that conforms to your beliefs. This doesn't mean your beliefs are wrong, just that you should be aware of your own biases and guard against them.

Excessive cynicism is a real danger too. Democracies rely on an informed electorate to guide decisions. If you throw up your hands and say the truth is unknowable so nothing matters anyway, you're giving into autocracy. There absolutely are forces that would like you to give up on the notion of being able to tell truth from falsehoods.

You may not know absolute truth for absolute certainty, but if you live in a democratic society and you'd like to keep it that way, you really ought to make an attempt to know what's going on.