Truth is not an echo chamber, accepting other people who aren't hurting anyone just by existing isn't an echo chamber, kindness isn't an echo chamber.
I don't need to consider "alternate beliefs" that are just lies. There's this idea that if I'm not constantly reading stuff by straight up Nazis, that I won't understand that they are Nazis. Not having to read nonsense as possible facts is one of the really cool things about having critical thinking skills.
A bit besides the point, but if you'll indulge me:
There are people who refer to echo chamber as a short for wanting a worse signal-to-noise.
At the same time it should be said that echo chamber isn't purely about data vs. lies, but also about points-of-view on the data. If the data is handled in an "echo chamber", the output may well be "true", but not appliable to the spectrum of reality.
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2/3
For example, in the history of Finnish politics (an example I'll use due to passing knowledge), there have been times when one party/ideology has raisen hegemonic. This has led to a situation where the people appointed from the party OR the ideas put forth by the same weren't fire-tested (so to say).
End-result was that you got sycophants and/or idiots who knew how to treat the party line, but didn't understand that the party line wasn't reality, but a simplified model.
3/4
Currently (and again, I'm speaking of Finland) the hegemonic idea is the effectiveness of markets against state-intervention or -services. This has led to legistlation that doesn't create effective markets, as the model used is too simplistic, leading instead to oligopolies and thus raising costs and falling services.
In this definition, does Mastodon have an echo chamber?
4/4
I can't speak for the fediverse as a whole, but presently we have council elections in Finland.
A list of candidates with Mastodon-accounts (some of them inactive) were made by @teemuki, with results:
Socialist Party 32 profiles (public support less than 10%; disclaimer: my party)
Greens 14 (10%)
Communist Party 2 (>1%)
Social Democrats 1 (20%)
Keskusta 1 (15%)
Eläinoikeuspuolue 1 (>1%).
In certain defintion of the term, this bubble of Fedi is clearly an echo chamber.
Ricki Yasha Tarr
Juho Mäntysalo