Do you have a mental illness?

Prevalence in general population of
Depressive disorders:1-23%
Schizophrenia:1%
OCD:1.5-3%
Phobias:4-11%
Generalised anxiety disorder:3.5%

Are these people getting the medical help they deserve? Are they even aware that they may be having a problem that is treatable? Or is it the stigma of being mentally ill that keeps them away from a doctor?
If some one doesn’t laugh at a person who has diabetes because of imbalance of insulin why should he laugh at a person who is having schizophrenia because of an imbalance of dopamine in his brain?