It seems a little circular to say that your argument is based on what is legal, when the discussion is about what should be legal.

Anyways I think your point is mainly that there is a line between what is required of a business and what constitutes a right to self-determination / self-expression. Where to draw that line is certainly not obvious and we understand new things about it as society progresses. So in that sense I do understand your point of view, and I happen to agree that certain decisions regarding what work they take should be allowed by a business, but I hope the point has been made that you have to be careful what you wish for when stating absolutes like "for whatever reason they choose."