From the court filing: "In July 2012, Craig and Mullins visited Masterpiece, a bakery in Lakewood, Colorado, and requested that Phillips design and create a cake to celebrate their same-sex wedding."
They requested that the bakers design the cake for their gay wedding yes. You can't make people design things for you if they don't want to. If you believe that people should be able to compel this sort of work then you are an authoritarian.