I'm Sikh, and I wear a Turban. Sikhism isn't a religion, its a way of life like Buddhism. The west brand it as a religion.
I don't ride without a full face, and never will. More for wind protection, debris, dust, rocks off roading etc... than anything else. We grew up in Kenya East Africa, my dads been riding since 16 years old, he never wore a helmet then and nor did any East African locals, heck they still don't on roads more risky than ours. Now, you wont see either of us get on a bike without a lid.
I don't get why Sikhs want to ride with their turban flashing their bikes, Sikhism like Buddhism is about letting go of materialism and helping society. Riding around a flashy bike, showing pride, instigating envy, isn't what it is about. The law should apply for everyone, not an exemption. Let people make their own choices, esp adults who know the risks, not just a sect.