That's it. It is simply about lack of choice. I don't imagine a crypto casino choosing to implement KYC because they prefer to do it. They should have opened a fiat casino instead. But what choice do they have? The regulation or the law requires that they should put up mechanisms to know their clients. And it is not just a yes or a no on the part of the crypto casino. What is in line is their license, their operation, their business. It is either they comply or they pack up and leave.
Gambling is prohibited in a country with a majority Moslem person. It will not tolerate if their people play gambling but people are smart enough to hide their gambling activity and that is why there are underground casinos that allow people to play without doing KYC.
If the casinos do not apply strict KYC, that will make gamblers feel okay and comfortable playing in their place and maybe that can be a place for people to spend their money by playing many games.
The casinos see this as their opportunity to get more members by doing limitations on the KYC to make money from many members still and do not have a problem with gamblers who avoid the KYC.