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?
No. It is would be very unreal for us to even imagine the governments and the regulations in those important jurisdictions are going to reverse their policies on KYC and AML measures. It does not make sense from their perspective.
It is true that in previous decades it was possible to gamble on casinos without providing much persona information to the casino, the staff of it and the government (indirectly), but one also needs to understand the differences between that historical context and the current context we are going through.
In previous decades, it was possible to gamble without KYC because one needed to use either cash or a credit card to fund one'a gambling session. With cash, one was required to show up to the place one wanted to gamble, which could make easier for the police to investigate, interview and even arrest people whose intention was to launder money. The credit card essentially meant the bank and the government had our information, it was some kind of previously done KYC.
In the introduction of cryptocurrency and the increase of popularity of casino websites, it became difficult for authorities to only rely on credit cards and people showing up at brick and mortar casinos.
It is a matter of evaluating the pros and cons on KYC and AML before summiting our information, I personally believe it is worth it enough for most of people as long as we keep criminals away from their liquidity.