Australian here. We have a pretty big sport culture, but there's also plenty of nerds, geeks, hipster, Bohemian and other intellect-favouring communities around. I found the observation about not bragging about your intelligence an interesting one. I don't think I can deny it, though the specifics weren't really familiar. But yeah, there's plenty of space for the "non-macho" types, even if maybe one has to go looking a bit, and avoid commercial TV.
So yeah, no. Just for everyone's information, although a decent number are present, Australia's population is not exclusively made up of knuckle-dragging anti-intellectual troglodytes.