Because there is online gambling and there are many ways to avoid that restriction that they do even online. Users can bypass that restriction by using VPN and as long as the online casino, crypto or fiat allows that per user then they can easily gamble back and forth, at any time that they wish to do.
That is why banning gambling activities will be just a nonsense act of the government because they cannot really stop the people from gambling because we are now in the time where technologies are so modern that even the government itself is still struggling to keep up and things will get expensive if they will exhaust some funds just to track citizens who are still gambling online or in-house casinos.
They are just wasting funds that could have some better use, they better think of regulations and not banning because the revenue that is generated by the casinos can be truly helpful to the country.
True, those gamblers that are not aware of the usage of VPN will eventually find it out how to use one if they're eager to gamble online. That's what the government wouldn't know or they probably know about it but they don't want to tell it because like I've said, they'll eventually know it no matter. The matter is that they've just made a law and that's it, it's good to be followed and as a government that's what they do but still, there really are a lot of ways of accessing it and they can't stop people doing those methods.