[la_barba]

Shockingly, I read the actual study.

"However, as we focused on politically-savvy users on Twitter, the reader should not infer that our observations generalize immediately to other settings, or that echo chamber effects are as pronounced for the general public."

Exactly what I said - " But it hasn't been shown that they always do it, or do it for the same reason in every case."

I don't know why you are pointing to a study that agrees with me.