And also casino can ask KYC using whatever reason they want without giving further explanation to the customers. This line is indicated on ToS of every casino. Your idea that casino can't request KYC is non existence in reality.
You misunderstood what I was trying to say. I meant that casinos shouldn't request KYC just because of certain withdrawal patterns. Do you know what exactly was unusual about his account? You don't!
Because you're not a part of their team. Jumping to the casino's defence in this manner without proper reasoning and proof is silly and pointless.