It's said about brain that, "use it or lose it" — now, question being, do you think if person plays brainless gambling games such as slots, dice for major part of his/her daily routine, will it make him/her dull?
Edit: "brainless" as in playing gambling games that does not require using brain, I thought it was clear especially given examples.
It is not only gambling that makes people antisocial, but it is also the neuro shit hitting. The prefrontal cortex of problem gamblers is usually underactive, which messes with impulse control & reallife decision making. There is no need of high level complex brain functions but they create an experience of what is referred to as a dark flow of trance that dulls self awareness & enhances dissociation especially to someone who is already emotionally vulnerable. That does not make them stupid but hooked, dissociated, & often lonely. Blaming is not a good way to deal this situation however they need some empathy & cognitive strategies to overcome.