I mean doesn't your take strain credulity as well? Let's actually think where most discussion happens these days, Twitter, Facebook, Reddit, the few remaining newspaper comments sections. I'd struggle to list more off the top of my head.
Why wouldn't influence campaigns, we know every big country to be running, target this site? What reason would they have to leave it out from their list? Why not target a major news forum for the more wealthy and connected (predominantly) Americans in tech? This is not an uwu smol bean site anymore and the cost of (undetectably) botting any given site is rapidly approaching cents.
I just see the same thing over again. I flag some article, then later I look at the comments and everyone is saying "rah rah there's a cabal of vote bots that flag articles". Obviously not - it was me? Is it so unthinkable that normal people on HN are flagging political articles because they are explicitly disallowed by the site guidelines?