The greatest fear of this action is, "what if this girl becomes addicted? " Just what if? Then it's going to become a big problem for the girl in the future which she might exhibit some addictive behaviors that no man would want to risk getting married to an addict or even after the is married, what happens when she starts using her kids money to fulfill her gambling needs, that means her children will suffer it too. If you must let your kid gamble, it should be at the right age and also with a strict guidelines of not becoming addicted.
It doesn't matter whether it's a girl or a boy, because a child's psyche is less stress-resistant, so I would be against my child getting carried away with gambling. My condition would be that you can only play after you reach adulthood, when you can earn money yourself and play with your own money.
Then it seems to me that the responsibility will be completely different, but while the child receives pocket money from me, I set the rules, and I will do this not for the sake of my whims, but in order to protect my child from unnecessary stress.
You are right, this concerns both girl and boy child as they can be negatively affected if being introduced into gambling at a very early stage, some people can even easily get addicted to gambling when they join it at the age of 18 because it still seem too early for them. I started gambling while I was already above 20 years of age and yet I made some mistakes without guide, then how about someone that started earlier than that and did not even have proper guide.