Asking for KYC was something optional in past but since online gambling businesses flourished in covid era it became a literal norm. People can't get used to changing laws in the world. You can compare crypto's ico era and now a a proof. Its too hard to be fraud and not get accused now. I also thought kyc is bad thing in past. But if i lose some portion of money as a result of some mistake in website, kyc can actually help me. I learned this.
in the end now gamblers have to get used to casinos asking for KYC when needed such as big wins, and gamblers also have to be prepared with all the risks.
at first I also didn't agree with the KYC method for withdrawing large amounts at casinos, but after I got used to it I inevitably had to comply with these conditions. and if it has to be done at a popular and reputable casino, that's fine with me. but if it happens to a new casino and don't have any trust yet, I hesitate to do that. because sometimes at casinos that don't know KYC it will only make excuses not to pay customers who win big but customers have been at a loss because they sent KYC personal data but in vain can't withdraw the winnings.
experience is the best teacher mate so OP had just to learn it the hard way but the essence of learning still lives on it so let us not fall from that same mistake so there will be no one to suffer like what op did.
gambling is about to lose if we are not knowledgeable mate, kyc or other policies may apply .
OP didn't suffer anything, he just told me about his experience, now he knows why big casinos here ask for KYC and OP shares it here so that we all know what actually happens to KYC in big casinos in this forum.
experience is very important not only in real life but in gambling it also requires experience to bet carefully with responsibility and from experience we can know the opportunities to bet last a long time in gambling.