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."

For the record, almost of all of the baking cases in the courts, including the famous Colorado baker case, are in states that have anti-discrimination laws for LGBT people. These cases are challenging the laws saying that it's the religious right to discriminate against LGBT people.