Why is it important to have a science-based understanding of the structure of our universe? try condensing your answer into a single philosophical sentence?

Because a science-based understanding of our universe is, more than other (myth-based or religious-base) understandings, capable of delivering (1) measuring instruments by means of which we can test our hypotheses regarding the structure of the universe and (2) a scientific language that is as much as possible free from ambiguity and vagueness.