Odin paid for everything he knew.
He gave an eye at Mimir's well for a single drink from the water of wisdom. He hung nine nights on the world tree, wounded by his own spear, to win the runes. He kept two ravens, Huginn and Muninn, thought and memory, and sent them out across the world every morning to bring back everything they had seen.
He is not the god of strength. He is the god of knowing things, and of what knowing things costs.
Which makes him the correct patron for the Australian bloke who already knows, thanks, and does not need to be told twice.
Three words on a shirt. Some jokes are better when nobody explains them.