This is the same tired argument that every bigoted person whines about when they're 'forced' to treat human beings like human beings.
You'll be extremely relieved to know that nobody forced them to open a business that sells products and services to the general public. They made that choice. The only thing they are 'forced' to do is follow the extremely reasonable "don't discriminate" requirement.
If you really can't see it, there has to be some kind of observational defect in your model of the world.