It would be pretty dumb seeing as twitter (to single out one) has huge numbers of fascists to communists on it still to this day. Personally I think the problem of "echo chambers" is a minor one compared to the problem of massive unitary platforms where western governments offload political debates on the limits of free speech and what constitutes disinformation to a bunch of tech execs.

Even though there might be different opinions that’s of no help when the platform tries to keep you inside a bubble that only contains opinions that agree with you.