A huge problem, which is the cause of this far more than "free speech" ever was, roots in these platforms optimizing for engagement. And then vacuous controversy maximizes engagement so you're really optimizing for controversy, which is a dumpster fire.
But separating the combatants doesn't just stop the algorithmically-promoted unintelligible flame wars. It stops the debate entirely. You lose the ability to even encounter the other tribe or have any idea what their views or concerns are.
But separating the combatants doesn't just stop the algorithmically-promoted unintelligible flame wars. It stops the debate entirely. You lose the ability to even encounter the other tribe or have any idea what their views or concerns are.