We’ve turned into a Hive, things are getting serious.

Their place in life is at most behind the wheel or at a machine tool, turning clockwise until lunch, but they want more.
At the first quick interview, or even at the second slightly more detailed one, they'll come across as pleasant people who maybe don't understand something, but overall give off a reasonable vibe, and probably they'll quickly learn on the job. You might even give them a test assignment, and if it's not on paper in front of your face but done remotely, they'll complete it using a neural network.
They'll be clueless during the first week of the internship — "well, that's normal" — then the first or second month — "okay, they're slowly getting the hang of it" — then by the sixth, the manager just doesn't care anymore; well, they seem to be doing something, no particularly loud screw-ups are coming from their side, but those who work with them or supervise them see and understand that this is just a clueless idiot who at best will do something by instruction like "move the cursor on this screen 3 cm to the right and 5 cm up, make one click" — incapable of thinking, or figuring out what should be happening in the overall process, or taking even a microgram of responsibility and doing something on their own. To any criticism, you'll hear "damn, I spaced out, sorry" at best, and at worst "uhhhhh uhhhhh well nobody showed me..." But even those who suffer from having such wonderful colleagues, without being managers themselves, won't have a particular mega-desire to go to the carpet and demand finding someone else, because the training process was long and unproductive to begin with, and searching for a new loser for six months in the hope it'll be better isn't a very optimistic scenario either. If the loser stays where they are, they'll still be a moron in a year, and in two, and in five. And if you try to replace them, you'll go through six losers in three years, and either you'll stay in the same position, or the twentieth one will turn out to be at least decent. After which they'll leave somewhere else in about a year. The wheel of suffering without a victory phase.

Kinda didn't quite get from the context what exactly "cave" is being talked about here...🤔