Right, also it's important to understand that the casino itself can't affect KYC results and their acceptance. They are just following the rules in their jurisdiction. If they must, by the rules, make a customer to go through the KYC process if he/she wants to withdraw over $5,000, they do it then. There's nothing they can do about it without risking to lose their license.
Should they warn about it in their ToS? Absolutely. It's their fault they didn't. But they are not that evil as one might think. They are not declining KYC verification on purpose.
You saying, they can't affect kyc results and acceptance,
is that supposed to mean the authorisation/clarification of a kyc document isn't done by the casino or sportsbook? Because, that would mean a lot for customers as, any means to some bias would be cut off and ensure more trust in the system.
Still, users needs to be familiar with critical parts of T&C of there gambling site and adhere to them as well.
Yes, that's what I'm saying. The KYC process is performed by a third party entity, which has no relation to the casino whatsoever. There are hundreds of KYC companies, or, in other words, identity verification providers, and online casinos, like many other institutions, are using their services, that's all.