While I do think the ruling is somewhat weird and contradictory like OP pointed out this business was going out of their way to make this an issue. Any business

While I do think the ruling is somewhat weird and contradictory like OP pointed out this business was going out of their way to make this an issue. Any business or individual can refuse work, you just can't do it for strictly discriminatory reasons but no one will know the reasons unless you tell them. If you as an artist/creator/business owner feels that way for whatever reason just don't do the job. Just tell the customer you don't have time or something. How hard is that?