I can respect some casino who adding required KYC before using their service. most likely about money laundry and legality for their customer. as we know some casino restricted some area for using their services. they didnt want their legality had problem because they didnt even know who using their service before hand . and also KYC in most gambling platform only formalities and they wont making harder registration for their new user.
I mean that would be the least that you can do when you are doing business, complying with the rules and laws that govern your business. I like the idea of KYC because it helps you not become a suspect of something bad in the casino because you know that you won't do wrong because they have your identification.
But still, people who do not want to verify their account will search for the gambling website which does not have verification because they want to stay anonymous. But some gamblers will not bother to do KYC if the site needed them to verify their account. Yes, the money laundry will be a problem for the casino and if they apply KYC for their members, they can protect their member's identity from bad things. So we hope when we verify our account by sending the document to the casino, they can give their best to protect the member's document.