I think you're barking up the wrong tree there as my stances are far from the "echo chamber" mindset. It is relevant in regards to the information argued for/against. Since we have let information spread virtually unregulated, expecting too highly that character would win out over content, we let a mass misinformation age decided itself for us. Now it is too late to reverse course. You stated "You have to actually delve into the information, ideas, and arguments and combat them.", and that is actually the point. You can pop into any comment section or forum anywhere and see the beliefs of people massively misinformed.
If there is overwhelming **appears credible but is actually massively inaccurate** amounts of information roaming the web or the airwaves, it makes it fairly easy for many people to become misinformed in bulk. Once met with conflicting evidence, if the misinformation is too easily accessible, most people will reinforce this belief with more misinformation, not less. Confirmation bias in full effect. What you are suggesting is that since all information is available, everyone can find all accurate info and dismiss propaganda or misinformation, which is far, far from how reality plays out.
We have flat earthers that will argue with "science" for crying out loud. As unideal as it may sound, the Information Age should have had better oversight to prevent where we are today with it.