Why we romanticize mental illness?

I have noticed that more and more people are struggling with addiction of the cure,

then I came to the conclusion that in some cases, "cool girls" simply romanticize taking cures and being addicted. Then I asked myself again, why we romanticize disorders?

In films and TV series, people with mental disorders are usually attributed with desirable traits, such as :

 mysteriousness, intelligence and extraordinary beauty.

This makes mental illnesses interesting and mystery. Some people also think that if they are mentally ill, they will get the characteristics of mentally ill people from TV series.