How do you quantify your marriage to those who say it was unnecessary?

If someone was to tell you that you did not need your marriage, you know you love each other and marriage was just a big useless ceremony, made the government, dressmaker, jeweler, and the florist richer. How would you justify marriage and why you felt it was the right choice to make for your union? Why did you feel the ”hassle” was worth if it, and would you do differently if you had to over again?