that day will only come when the government fight against decentralized systems ends and of cause, I don't think it will. Kyc before now was a thing of choice on most online platforms or casino to be precise. Users loved to protect their privacy and identity and thus stayed away from any means of verifications that would expose their identity. Though privacy and anonymity was an advantage of the non kyc, but then every good side has a bad side.
We heard of stories how criminals used casinos to steal funds with no trace. They make deposits to their casino accounts and since there was no identification, they can go scout free without being caught. Government got tired of all these and thus verifications were imposed on these non kyc casino. So I don't see the casino stoping the kyc verification anytime soon as the government are still trying to fight against decentralized systems.
The government will not lets that happens and will make sure KYC still apply in online casino. The government will try to search for the casino and asks them to apply KYC for their members. The government wants to prevents money laundry in the online casino because that will not easy to track.
Only with the helps from the online business owner, the government can gets the data although that can be fake by the users. But at least, the government can start to track them by checking their personal documentation. That will helps the government to know who they need to be wary of.
The purposes of applying KYC is to prevents the illegal business that the governments don't know. If that happens, illegal business actors can do many things with their money. Before that happens, the government will trying what they can do to prevents that.