I would think it might be something like describing some young buck's first pub-crawl as his first communion. The walkabout is, originally, an aboriginal rite of passage and as such has something of a religious connotation. I think it has taken on less spiritual connotations among Anglo-Australians but it may raise the hackles of some Natives who feel that the old ways have been compromised.

Just the rantings of some know-nothing Yank.