Australia is primarily short period swell. Like size, (weather) conditions and shape, once you get used to surfing California style clean, long period swells, it's hard to get excited about chop. Ask yourself why people like Tomson, Curren and many others moved/returned to live/surf in Calif.
That's the fatal flaw/attraction of California: world class surf, but available only on a limited basis - the classic resource scarcity conundrum. So, the original pioneers had it great, but then like anything which is revolutionary, fun and healthy, it took the world by storm. (Pun semi intended.)
I mean, consider the original exodus to San Diego & Santa Barbara by the West LA/South Bay crew (original CA ground zero) back in the 60s. That is the stuff dreams are made of - N county, Rincon, the ranch. But, nothing lasts forever, especially in the most dynamic economy on the planet