yes i can say its more of a guy thing. one of the reasons why i think its so is because of the financially responsibilities that the men do shoulder and also that men always want to earn more so its pretty easy as a guy to get involved and also if you have friends that are into it then it will be more easier.
Following that logic, men should be less prone to gambling, since they are more focused on financial responsabilities and can't give themselves the luxury of spending money with gambling, which doesn't guarantee any financial returns in counterpart... It seems men are into gambling for another reasons: maybe because they have a higher necessity for thrill than women and to escape from the stress of daily life which involves those responsabilities you mentioned above. Gambling for men is a moment they can finally stop caring about their burdens and having an ephemeral pleasure moment.
I see your reason @ uneng especially if we are to weigh the winning rates of those men who gamble and we see the number is actually small and that could mean that the argument of taking care of the family or family financial responsibility is really not strong. Even where some men feel they are gambling to meet up with the financial needs of their homes, how far have they been successful in winning yet their family is still surviving. The valid point is while gambling, it also affords the man the opportunity to ease off from the distractions and challenge in the home especially when it is offline, the man use the opportunity to hangout and get some fresh air from the environment.