(The article appears to complain that the John Birch Society were wrongly deplatformed, if you want to know how far out the author is)
Political or ideological opinion pieces rarely meet any of these conditions. That doesn't mean they're bad articles, but it does mean we would reserve the turning-off-flags move (which ought to be fairly rare) for articles that do.
Does that answer your question?
I think it's just evaluating the claim that removing these people from a public platform removes their ideas from popular discourse, which obviously didn't work. The article is arguing that failing to engage bad ideas head on leads to increasingly insular an polarized groups within society.
But... how obvious is that? Perhaps it did significantly reduce those ideas when it was active. Like, if Musk hadn't reinstated Trump's account we could be looking at a different presidency.
It doesn’t even lead to better discourse. We’re both here, commenting on this forum right? It’s because the level of discourse here is higher than elsewhere, certainly much better than “free speech” platforms like Musk’s. How can that be, when HN has extraordinarily strict rules on acceptable speech? Even calling someone an idiot can get you banned here, let alone a pajeet or Paki. If you truly believed in freedom of speech, you’d quit a forum moderated like this.
Deplatforming removes a voice to a captive audience where one has entire lively hoods taken from them, their viewpoints suppressed and are forced to other platforms where the userbases are questionable offering their own infinite scrolls and dopamine hits and their own cancel cultures.
It is what it is.