According to them, the reason behind this is they're confident that children know already about the money.
Children
don't know about the money. But even if the children don't know about the money, they may still get another bad impact from playing gambling repeatedly. They will make gambling be their habit because playing on it regularly. It is not a good thing for children, they can be addicted too early to gambling. Addiction from a very young age will be hard to recover, this will harm their future.
The perceptions of gaining money in this kind of ways in life will be established as they will think that gambling is a good source of earning money.
Children mostly can't justify what's good and what's not in life they should be well guided if they will be allow to gamble from their young minds
it will be difficult to change them once they've got addicted.
That is why the age restriction in most of the countries are 18 and above because those persons are now mature and they can now fully control their emotions and their thoughts. Those countries who have regulations where the children can play gambling will have a bad effect especially if those children will become addicted to it. It will become a big problem because those children doesn't have fully control their emotions and thoughts that can affect their psychology.