I see it this way... Proper discussion (the way reddit was designed) is like a groups of gentlemen throwing piss disks at eachother. But when we we are insecure about the quality of our piss disks, we don't let other groups of gentlemen into the piss disk match, so these groups become echochambers. You start stockpiling piss disks without anybody to throw them at. When the various groups of gentlemen eventually reach piss disk criticality, the entire population then drowns in piss disks, causing far more damage than what should have been a friendly piss disk throwing contest.