Justice Kagan is an idiot. A restaurant meal and a wedding cake may both be food but they are not familiar in regards to artistic expression. A wedding cake is chosen not only on the basis of taste but for its artistry. That artistry is expressed by the baker individually for each couple. The couple participates in the design and presentation of the cake. The same cannot be said of the majority of restaurant meals. Not only that the wedding cake provider is usually required to enter the reception venue implying that he is quite comfortable with supplying the cake even if outright enthusiastic approval is not part of it.
As for makeup artists that line of questioning should be answered clearly. No a Christian make up artist should not be compelled to supply her talents to a drag queen.
But religious liberty need not enter the argument or even the free speech issue. The most basic argument is that the government shall not force anyone to enter into a contract. The government has no business asking the why of that decision. It should just respect the freedom of the parties involved.
we have tv series dedicated to cake as art but this is not art?