C
The reality is that we do have priests and churches and formal acts of worship on a regular basis. Of course those who reject such concepts are free to do so. But if you do accept them, it seems right to me that you should dress in a manner that reflects the significance and solemnity of those acts of worship. Is it such a big deal really? I am obliged to wear a uniform to school and that is not to show off or be exclusivist or elitist, just to acknowledge that I am part of a community with a shared identity and common values.