The baker's were usually tied to a church or denomination. We had a Catholic cake lady, a Lutheran one, and a Methodist/Baptist one. Each lady typically served their specific church or churches.
In my personal case, as my Bride is Catholic and her cousin was the local “Catholic” church cake lady, she got our business. But typically it was (and I think still is) done by where the wedding was held.
Yes, churches have a great ability to organize and protect themselves and their members.
Still, the legislation and lawsuits should go forward because more is at stake than just weddings. As one astute poster reminded us that the Soviets drove Christians into their homes and harassed them if they should show any trace of their Christianity in public or in the workplace.
In the meantime it is a good strategy to ‘close the loop’ while fighting the broader battle for religious freedom.