The terms of who is mentally ill and criteria for diagnostic criteria change and evolve to fit the times so yea I believe there will once again come a time when seeing a therapy professional isn't looked down on by anyone. As for having people be against mental illness. no one is a clone of each other and everyone has their own beliefs and fears and so on. Alot of times people fear what they don't understand so they put it down. Not everyone in the world is going to totally understand every mental health disorder. its impossible. just like more and more physical illnesses are discovered and named every day so are mental disorders and even those in the fields of those disorders don't know everything about them so people who are not in the mental and medical fields are not going to know and understand. So no stigma of any mental or physical disorder is not going to be completely eradicated some day.