[glenstein]

Exactly, and this highlights what I've never understood about echo chamber arguments. You might genuinely like things that you learn from, things that change you. You might like a subject matter that encompasses a huge variety of types of content- for instance if you follow astronomy, and see an article about a new discovery, it seems like more is going on than a pre-existing belief being echoed back at you.

I'm not saying there's no such thing as echo chambers, but there's so much else going in when you engage with sources you select that doesn't have anything to do with whether a pre-existing belief is being echoed back to you.