This said it's both parties (inb4 "both parties are fascist"). This would seem to apply to things like "J.D. Vance fucks couches." Do Democrats know it's false? Of course. But he's weird, and doing that is weird, so they're willing to keep saying it. Yes, it's a joke, but it also seems to match what's described in the article.
There's lots of equipment that can't accept certificates automatically. If they can, it might be in a closed off way that's difficult to impossible to reverse engineer. If you can, that's still a lot of skill and labor, which drives up the cost. They also might find out that it would be insecure to do it automatically.
Given that specific locations were named, I assume that the original message says more than what the tweet says it does.