Alba, I suspect that even though it appears that you are thinking differently there are much more similarities than there appears."co-occuring behaviors" substance abuse/addiction and mental illness or disorder.
Complex trauma even though it is not a an official diagnoses normally includes such things as personality disturbance, dissociation and disturbances in relationships with oneself, and these are very strongly linked to substance abuse and addiction and general mental illness and disorder.
Things such as a baby not being responded to when it cries or such as a mother not loving their child contribute enormously to these things. As does emotional and verbal abuse and neglect.
There are much less people who are traumatised in the PTSD sense but neglect and emotional abuse and the lack of support for a childs self esteem as it grows up is hugely linked to not being able to regulate emotion and disturbances in self formation which in turn is hugely linked to addictions, self harm other mental health issues and personality disturbances.
All of us know that reliving is something that is different to anything else. I think its just easier to treat if one started from a place of being able to regulate ones emotions, has a strong sense of self before and has close and functional relationships.