This is interesting, because Mental illness is so common that you are basically weeding out the only ones getting help, and hiring the ones who are ignoring (and therefore not treating)their mental illness.

Probably the most productive, well adjusted, and successful person I know, attempted suicide and went through years of treatment, before becoming so well adjusted. He had an illness, he got treatment, he got better.

I would rather hire someone in therapy than someone who isn't getting therapy. Even if they are both functional and normal. Why? because the guy in therapy is being proactive about self improvement and personal growth. I want that guy on my team!