I think the poster meant that the Polarization is so acute at this point that the Polarization itself needs to be treated as distinct phenomenon (and remedied to some degree) before any progress can be made.
An analogy might be the phenomenon of Complexity in software.
That's not what it sounded like to me. It sounded like they were putting the blame for hazardous actions of others on the media (of an all-encompassing scope) for discussing the hazardous actions being committed.
Which to me seems like slinging jargon rather than registering any kind of context. To me, it sounds like a misreading of McLuhan more than anything. In fact, McLuhan's point was exactly that kind of misunderstanding and misreading should be avoided by not taking the context for granted.
An analogy might be the phenomenon of Complexity in software.