I feel like this is a deeply intertwined issue of economic inequality and power dynamics and that you want to only solve the media aspect. I believe it's akin to treating symptoms without treating the cause and as a result it probably cannot succeed.

To go back to one of your earlier questions: "How can we learn to disagree gracefully?" We already know how to do it, but as long as there will be people paid to provoke, there will be public instances of people strongly disagreeing for good reasons.

These people are paid either by people who believe there is a culture war and that it can be won somehow, or by people who have a vested political or economical interests in stoking said culture war. As long as there will be an incentive to do so, they will continue to fund incendiary radio host, podcasts, cable TV, newspaper and websites.

There's one of the root causes. When this is out of the way, we can talk about the second leg of the problem, advertisement encouraging people to strongly identify with brands and products. At least in the West, there is no incentive for anyone to find a sense of self outside of consumerism. So people have heated arguments over science-fiction franchises and sports teams.

And then finally, there's good ol' jingoism that makes the world looks like Black (bad) and White (good) for the benefit of governments. Then people strongly feel about a country they didn't choose and you have all sorts of non-conversations between people from different countries who talk past each other.

So yeah, for me the issue is way larger than just media literacy.

Of course. The very term "echo chamber" was probably coined by a right-wing media personality to complain that they couldn't reach as many people on the left as they would like and so goaded said leftists into being exposed to more right-wing propaganda than they may have liked.

In practice, though, it doesn't reflect any reality. We are constantly exposed to opposing views on social media, if only because our immediate contacts who vehemently disagree shared them to vent.

I believe the reality is the exact opposite, we are bombarded with so many opposing views that we have to react by tightening our social media circle in order to reduce the received mental damage.

My strategy would rely on taxing corporate profits and capital gains that I believe make right-wing patronage so widespread in the first place. It would have other benefits for society although I'm not able to predict which ones with certainty. It wouldn't completely solve the capitalist power dynamics but I believe it would take the edge off it.

Now I don't think it's going to happen, because of the current power dynamics in favor of capital, but I don't think communication education, while good on its own, is a path towards that goal, mainly because I don't believe we aren't lacking the ability to communicate with people, we just have no incentive to do it.