Whilst for the laws from the churches, they can make changes anytime they wish as long as their council agrees with that and the process won't be that long.
That's why to whatever perspective you are looking that, IMHO, the important thing is you gamble your own money and you control your own life.
It depends on the religion and government/constitution you take as example for it, there are religions and branches of religions which are pretty much inflexible to the changes of their doctrines, not matter what the councils say. For example, lately the Roman Catholic Church has been more flexible to people who identify themselves as part of the LGBTQ collective, but Jehová Witnesses do not agree with it and continue to be pretty much against the existence of homosexual marriage, adoption or the existence of rights of the homosexual people in society. On the other hand, there are countries where it is pretty much easy to change civil laws, as long as there is enough support from the people to pressure lawmakers to do so.
It would be easy to lax even further tax on gambling earnings on the United States than convincing people within the Ismalic world about the individual freedom we all have and having them to gamble with no problem on their believes.
Religion is very difficult to deal with and can be very inflexible, specially Islam, people of that religion take the words of the Koran to the letter, literally and some who have been radical from their childhood would never gamble and would even condemn anyone in their family if ever caught gambling, it is different in Christianity. In Christianity is possible to even an adulterer to be given forgiveness.
But those are like a few that have been established for so long and that's why no matter what changes they wanna do like allowing to gamble for just some few amounts, it won't be changed.
Still, it's on the people whether to take on those laws seriously if they're devoted but of course about the government laws, they should be devoted on it at all times.
what and this is would really be according into their own interest and preference on which we do know that this is something that will really be that depending on a certain person.
No one could really be able to stop those people on dealing up with something even if its prohibited or not really that allowed, as long they could be able to see those things or paths
then this is where people would really be playing no matter what. Neither it could be sin or unlawful or whatsoever then they dont really care about it.