[moron4hire]

Echo chambers are deliberately created by the platform according to what they think will keep the user on the site. It is fundamentally anti-user. This is the person self-selecting what they want to see. It's a very different thing.

[Dumblydorr]

Echo chambers are also chosen by users, though. They choose who to friend, follow, un follow, like, block, etc. In a broader sense, people have media habits that are fueled by their own views, I doubt a trumpism follower would choose to read NYT or WaPo. There is some personal agency here.