In my opinion, having more women gambling is something worrisome to me. I know many have tried to associate all of these kind of discussions to religion and religious beliefs, while I will also take that into account, that's not just the only reason why I don't seem to be comfortable with having more women flooding the gambling industry.
When are naturally fragile and emotional in their character. When you bite a man for the wrong decision he made, he will grumble and let go of the situation, but if it was a lady, she will cry all day and keep such event in her mind reflecting on herself and living the scars with her for a long time.
Having more females than males in gambling is something the society where such thing is happening has to be ponder about. Gambling is an activity of financial risks and when a woman that is meant to be the assistant to the husband and the family is now gambling to feed the family and take care of her needs, in that case something might seems wrong. It is not that women are meant to gambler but it's about the risk it could pose to the entire family as time goes on. Just imagine a mother using the fund that is meant for dinner for gambling, it means something is wrong somewhere and if it continues, problem could emanate where the children will have to fend for themselves anytime their mother incurs loses in gambling activities.
Well, that's also my concern, where as you mentioned, it is common for a woman to manage all the finances generated from a husband's work to be allocated to various primary and secondary needs in the family, and of course the concern is as you believe that when a husband gives money to his wife while his wife is involved in gambling, it is very possible for him to use the money to fund his gambling habits, although the amount may not be too large, but of course over time the amount will certainly pile up which can indirectly cause serious problems in the family's financial situation.