I would say it's even more basic than that. The "marketplace of ideas" paradigm only works when there is in fact positive incentives to sustain the marketplace. In a environment where it costs next to nothing to disseminate bad information for personal gain, there is no economic mechanism to stop people from doing it.
Even if we had unlimited bandwidth, it would be wasted in such a war of attrition.
Even if we had unlimited bandwidth, it would be wasted in such a war of attrition.