He probably got asked by customers if they served kangaroo. It isn’t an unreasonable expectation for an Australian-themed restaurant to offer it, given it is sold in many supermarkets in Australia, and it isn’t hard to find restaurants in Australia with it on their menu, even though the majority don’t-because it isn’t hugely popular. I like it, but I rarely eat it, largely because my wife and kids don’t like it, and we aim to cook things the whole family will eat. If they did like it, I likely would eat it a lot more.