Psychiatrists however do deal with what certainly are those areas where chemistry and mechanics are relevant, and there is abundant evidence that chemistry and mechanics are definitely part of the picture and increasing evidence that genetics also plays a part.
BUT again; None of this has anything to do with the Big Bang.
Not trying to sound austere, but if it has nothing to do with the topic, then why are you responding?
Hard for these tangents to remove themselves from any given subject in the debate. It would be like talking about water without mentioning it's environment or the environments temperature or the laws of physics, or even their origin. The analogies are endless.
But I agree, the mechanical is most definitely a primary part of the picture.
Hence my acknowledgement of another thread.