Good Q, Miswimmy1!
There is certainly a considerable section of Western society that has yet to understand and accept mental illnesses, unfortunately.
It would be very helpful if we felt safe enough to admit that we do suffer mental disease. And I think that it could be very helpful to emergency staff in certain situations. However, I think that many of us are afraid to be "discovered" and pin-holed into their pre-conceived notions of people with ___ disorder.
I actually have a couple of "physical" brain diseases that would be helpful to let others know, via a bracelet (or something), yet I cannot bring myself to do it...as they are also brain-related. IMO, most brain-related diseases and injuries are still largely misunderstood & scoffed by many in Western society.