That's not exactly about intelligence being maladaptive, though.
Of course, but the distinction isn't useful in this context. Proxies for intelligence, like large heads, became maladaptive, so intelligence itself declined along with cranial size. It remains valid for the original argument - that the assertion that for some groups, large craniums (or other traits that augment intelligence) may have become a liability, isn't controversial.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.