Basically, anyone can deposit, play and withdraw under normal conditions without performing KYC. So I think there is no problem announcing that they don't do KYC. It is also part of the marketing, telling people one of the unique features of the casino. KYC will be implemented when they found an account suspicious. So it is part of an investigation when the situation isn't "normal".
I understood your point correctly and I don't have any problem with that either, kyc is only requested when there is suspicion with the account and the account is under investigation that way kyc can be demanded for, and this is the practice with most casinos this days so that is understood that kyc is somehow part of the site but not mandatory to all players unless under strange behavior from the player.
I also understand where you are coming from. Some casino exploits this kind of situation wherein they implement KYC on an account that happens to withdraw a huge amount of winnings just to prevent the player from bagging that huge amount in a "legal" means. We have seen lots of cases like these, even though some accounts are clean, they still try their chance to rob those players of their winnings.
Hopefully, we won't see Euphirabet.io use this KYC to exploit their players and prove to us that they are indeed a reputable Casino company that we can entrust with our bankroll no matter how huge or small it is.