except echo chambers usually lock out dissenting voices and prevent repugnant views from being called out. they can also be breeding grounds for disinformation

except echo chambers usually lock out dissenting voices and prevent repugnant views from being called out. they can also be breeding grounds for disinformation and indoctrination, so allowing them to propagate (and become normalized) doesn't really work. this becomes especially bad when say, a young person goes online and is gradually convinced that their own failings are actually because of some external force which is taking all the jobs, or taking over the country, or some other falsehood which leads them to real life violence.