I think I see exactly what you mean Titan. Have experienced inexplicable behaviour around me which has transpired to be a predisposed psychological condition. Life experiences count too as you say and the material situation in which we find ourselves. (I have found talking therapy can help if lucky enough to meet the right person or doctor.) As for DAs, I am on a smallish prescription at present so can make no judgement.

http://www.channel4.com/programmes/dispatches/4od#3390633

http://www.responsiblegamblingtrust.org.uk/index.html