"Addictive personality", now there is a deprecated phrase!
In drug rehabilitation, the phrase is no longer used. Instead people have a bingo card of disease, conditions and syndromes to go with addiction. Once people have been pigeon-holed in a dozen ways then the die is cast, these conditions are no longer imaginary, you have to hold yourself up in life because X, Y and Z prohibit you from even giving it a go.
Regarding the article, I detest organised gambling, however, relatively few chronic gamblers end up homeless and destitute. You need a good dose of class A drugs and a smorgasbord of childhood trauma to guarantee the truly negative outcomes.
I don't object to gambling amongst friends, even if it is on a card game. I might bet someone that they can't beat me on Scrabble, but I would be getting the dopamine hits from laying some massive, high-scoring words on the board to devastate my fellow players, but winning that £10 just ups the stakes and my competitive drive. If I am just betting on a sport (or even a Scrabble game) played by others, then it isn't quite the same.
What does amaze me about modern day gambling is that you know it is rigged. I don't trust an app to honestly flip a coin for me. My version of the app would be 'if heads show tails and vice-versa most of the time'. Yet people pour their life savings and some more into apps that are black boxes with no way of peeking inside to see how it works. The seasoned gambler must know that every game is rigged and that the house always wins, but they still queue up for another spin.