It’s not about how huge your withdrawal but depends on the overall activity of your account since you can be subjected immediately to KYC if you show some shady activity.
This is true.
Other gamblers don't understand that they have been subjected to KYC not only for one thing. Because most believes that it's all about the government forcing casinos to ask for KYC.
Yes, that's one. But the casinos will also ask for verification due to shady activities where they can see it through your account audits or logs.