On the one hand, Gaining capabilities unpredictably is a bit exaggerated - it's more that a lot of apparent capabilities are embedded in language and these models approximate the truly vast amounts of text they've digested (imo). Just as much, LLMs don't express their creators values 'cause they don't express any values, they average language responses (though people certainly can see them expressing values, which can cause problems for the people).
On the other hand, the point that their creators don't understand them and are still quite willing to toss them to the open Internet really show considered carefully whatever their exact capabilities.