I think the deep thinking does find answers for some, creativity, comfort and escapism (from the cruel world - excuse the pun). The mind is deadened and when the deep thinking is there, thats all there is.

I still fail to see the point you are trying to make here. What do you define as deep thinking? Thinking about deep subjects (sense of life, yadda yadda) or depressive thoughts?

I don't think deep thinking deadens the mind... Not any more than shallow thinking.