I never insinuated that it was a complicated thing at least not for most. Just saying that based on the experience that some gamblers have had or heard off from other gamblers about how a casino started suddenly demanding KYC after a huge win and they wanted to withdraw
You can not only give one information like a KYC request after a huge win and a withdrawal request from the user. Huge wins can be won by different ways, fairly or by cheating, and only the casino knows what happened with that user and that big win.
I of course don't consider it as an automatic acceptable action of a casino, and it can be a shady action from the casino too. Without enough information and evidence from the user and casino, it's not good to conclude who is wrong between them.
It's common to be asked for KYC when you win big to verify whether you're human or not. This also serves as a form of database for the casino itself, confirming that a large win has been made in your account. This is no longer unusual with the complexity of regulations. While I know it can be frustrating, you'll still be helpless because the casino has the right and responsibility to enforce KYC on its customers.
some of these gamblers will prefer KYC at the initial stages before they can even make a deposit if possible rather than the later stages after their huge win.
If they like KYC at the initial stage, they are free to submit documents and complete KYC initially. I believe all platforms allow their users to KYC after account registration, and there is no restriction like you can not KYC at initial stage.
It's certainly better to complete KYC from the start, as it's much better. If you win big first, the KYC process can be very complicated, and unfair casinos will make things difficult for you. So, KYC should be an option from the start before you make a depos