You've already said it. What does it mean to be the head of the land? We also have President who is no so functional but he's the head. He's the first person. He generally sign off all things (bills) because things come to him after the government under him comes with a mandate. But we had instances where he never returned the signed bill because he did not want to.

And how is it same in India because India's Constitution borrowed the concept of a federation with a strong center, residuary powers vested in the center, and the appointment of state governors by the center, and the advisory jurisdiction of the Supreme Court, from the Canadian Constitution.