Soldato
Yes you're correct those with powerful levers to disenfranchise the voice of others live in an echo chamber of like minded people. Which is in no way problematic.
But they aren't attempting to disenfranchise actual voters at the ballot box. I know what my anger would be focussed on.
The idea that Twitter is an echo chamber is frankly laughable. I see no end of right wing and even far right wing voices on there.