Sure, it's a great method for understanding causal relationships in the world. It's also a method that humans invented, and it's not proven that some future invented method could not provide as much insight into the world as the scientific method. Calling it the ultimate authority and saying that "here literally can not be a higher authority than it by definition" is hard to defend IMO. Science gets its authority from consensus, right now we all agree that science should be granted authority! But it is clearly lacking as an all encompassing tool for understanding: How does the scientific method teach morality? It's not clear that it even can.