You will easily find many crypto exchange services that don't require KYC verification from their users than crypto gambling platforms because online casinos are regulated and they are given the free pass to run their business by the government, KYC can't be avoided and if your favorite gambling platform is telling you that they don't need KYC verification then you should be smart enough to understand that the casino is not regulated, they can seize to exist some day when the government hunt them down.
If the KYC requirement is not something you like then do not gamble online at all, I will leaves non KYC verification gambling website for the one that requires for KYC verification, because no legal online casino will run without KYC requirement.
I wouldn't say that many cryptocurrency exchanges still don't require KYC. On the contrary, the trend is that there are fewer and fewer exchanges without KYC every year as regulators put constant pressure on them. As for gambling platforms, I agree with you that users should choose only legal casinos with appropriate licenses. However, the problem is that the crypto industry has had a lot of cases when users' personal data has been hacked and leaked, and this is probably one of the main reasons why many users are skeptical about KYC and try to avoid it.
In addition to the constant leaks of personal data from those provided to the exchange or casino by KYC-verified players, which obviously violates your privacy, do not forget that in many cases the player simply cannot reveal his identity for many reasons.
This may be gambling bans in the country where he lives, it may be his personal reasons, for example, he hides his hobby and passion for gambling from his boss or employer. In general, there can be many such reasons.
So casinos without KYC are quite in demand by players and it is obvious that they should be on the market and work. Of course, there is a danger of disguising a fraudulent casino in this way.
But on the other hand, leaving millions of players without the opportunity to gamble anonymously and without compulsion to KYC is also completely wrong.
There should also be legal casinos providing services anonymously. And how to deal with scammers, while I think law enforcement agencies are well versed in this.