KYC should never be required on withdrawal of winnings, as that money has come from the casino.
If a casino is concerned about money laundering they should only be allowed to ask for KYC prior to deposit.
The KYC system is being abused by the casinos, who will do anything they can to delay a withdrawal, in the hope you will start playing again.
It doesn't only matter where the money comes from, because AML laws also require to know where you are from and who exactly are you. There are some blacklisted names and countries they can't do business with. And since people use VPN they can't just trust on the IP where you are from.
Also your last sentence doesn't make any sense to me. If the withrawal is delayed, why would you play again until it's solved?