It’s not possible for this to happened since there’s a decentralized casino which doesn’t require license to operate. Your topic is only applicable for centralized casino which is the only casino affected by license since they are operating under a company or legal framework.
Okay, let's assume there are indeed decentralized casinos, but could you name some decentralized casinos that gamblers actually frequent? What I know is that most of the popular casinos are those that promote themselves in the forum, and I haven’t seen a popular decentralized casino here.
Assuming this will happened then submitting KYC is the wise choice since we don’t have any option to gamble anonymously.
If there's no more option then its a wise idea as that would kill your passion in gambling if you can't gamble.