Casinos existed without the need for KYC's until the government made it a requirement, and they started demanding it. IMO If the government no longer requires casinos to do KYC verification for new gamblers, casinos will go ahead and still do KYC verifications because they have seen the benefits of knowing their customers better than when they just allowed people to come onto their platform and gamble without their knowledge of who they were. What do you think? Do you think some casino's will revert back to non-KYC and allow money launderers, plus other fraudulent people have their easy way with them as a way to attract customers, or since they recognize the personal benefits of KYC to their casino, will continue demanding it even if it affects their customers?
Firstly, the government will never change its rules regarding KYC, in fact they will probably try to implement things that are more difficult, and it has become a habit to be able to control its people, but if that happens, I doubt the casinos will also become non-KYC, without meaning to accuse the casinos, we have often seen how casinos use KYC reasons to withhold their users' money when it comes to large funds, and this seems to be effective.
Many casinos don't mention KYC clearly, meaning they only ask their players to do it because of certain circumstances, so there are also casinos that actually don't like to implement KYC on their users, so in my opinion if that happens then there will be two camps of casinos that stick with KYC and casinos that are truly free from KYC, I'm sure there will still be fans of casinos with KYC like traders who still choose CEX even though there are DEXes that don't require KYC.