I tend to go with the idea of the crossing over point as well. I would guess that therapists tend to feel this way because by nature, most of them don't see things as black and white as either "you are or you aren't" or "you were born with the disease of alcoholism or you weren't". As a whole, therapists seem to be into root causes for problems. I would say that most of the therapists I had more or less felt I became an alcoholic because I started using alcohol to cope with life stressors at a very young age. I think I just as easily could have become a food addict, but given my mom was one and it had forever annoyed the sh*t out of me, I thought booze was "cooler" (at the time) and it suited the crowd I hang out with as well.