You must not be much of a gambler cuz this isnt how kyc works. These gambling havens want the ir customers to keep playing they dont want them to leave their gambling haven. The players lose more than they win so it is not in casinos best interest to not let a degenerate gamble. kyc is normal for bitcoin for reasons already stated.
I don't buy it.
Fuck KYC.
freebitco.in has no KYC and they are killing it.
Also see:
Sadly point 2 applies also to many pure crypto casinos. There are only a few of them don't ask KYC at all.
Casinos use KYC to cover up their lack of technical knowledge and general faults.
If someone goes to freebitco.in (it is only an example, the truth is i don't know any other casino that is completely KYC free) and win 1000btc today by hacking the website or by just playing honest and withdraw it immediately, they won't ask you your KYC documents. You'll be able to get your money right away.
But if they catch you while hacking, they'll lock up your account, seize your coins and give a kick in the butt and post the proofs in the forum.
That's how you should deal with scammers.