For Australian residents, the online format is particularly convenient. The distances between cities are large, and the ability to play blackjack or roulette from anywhere in the country is a real boon. No need to travel to Sydney or Melbourne to a land-based casino. All the excitement is in your pocket. All you need is a smartphone and the internet.
Besides, in online casinos there is no dress code, no queues, no crowd noise - just you and the game. This is freedom of choice, when you decide how long you play, at what stakes, and when to stop.