What I don't like about KYC implementation is when it is made compulsory. That is not necessary. Another reason is that when it is seemingly being used to prevent winners from getting their prizes. KYC could be weaponized so that casinos would not pay up anymore.
We as small gamblers, may only be able to follow the rules of the casino, but we can still look for other casinos that don't strictly implement KYC. But if the casinos end up asking the winners for KYC only to prevent them from getting their prizes, we can move on to other less strict casinos about KYC.