Remember that evolution favors individuals who survive & gain status, not those whose representation of the world is true. Someone who is right but killed for it (eg. Copernicus) is still dead.
The fix is for people to be aware of these cognitive biases in themselves, to actively seek out information that differs from their preconceptions, and to challenge inaccurate information (with evidence!) when presented with it. You can't outsource this to a communication platform, because it's inherently less comfortable and more effort for the reader, and the reader will just go to a competing communication platform that makes them feel better.
[1] https://en.wikipedia.org/wiki/Illusory_truth_effect
[2] https://en.wikipedia.org/wiki/Confirmation_bias