Because you didn't read the rules that Tilda told you before giving you cards.
She even let you play with her for free an unlimited number of times without any risk, right after the explanation, to get a good grip on the game.
Yeah that's what I tried to do , previously I had saved the game right before the free try , so when i got back to the game I had unlimited tries to understand the game , but even after that attempt there was no way to understand the game since the explanation was before the save.
A suggestion would be to add a dialogue choice to replay the tutorial dialogue even after the free attempt.