The filter bubble shows up even with nothing nefarious from anyone.

There's simply too much information; you must choose what to look at.

Filtering can't be done only by you, because it requires looking at all of the information in the first place, it must be something outside you.

We think we know what is true and what deserves attention, so we take our limited attention and train it on that bullseye, becoming more efficient at it.

But it's a roving bullseye!