Compared with offline Casino and online Casino that requires KYC, I think offline or land-based casino gives more anonymity and privacy to a gambler than an online casino that requires KYC. The reason why I think land based casino is much more anon and private is because the securities of land base Casino don't ask us to submit KYC or present ID when we are playing at their establishment. Except of course for some special cases,
The special case here is that whenever one wins a big gamble or gets a jackpot he has to compulsorily do KYC in the casino. Be it land based or online based. Because a gambler with large payouts needs different information not only for the casino but also to follow different government regulations of that country. However, land-based casinos usually offer more opportunities than online casinos. I agree with you that land base casinos are safer for gamblers than online casinos.
I've not been in a traditional casino for a long time but afaik they are already asking for IDs before a customer can go inside. But the fact that your face is seen and you are on thier cameras the whole time, that's not being anonymous. Every one is checked whenever you go inside a building. A person with a young-looking face will be asked to present an ID. If you are a regular gambler I guess the guards can just let you.
I had been in a different casino, and the security maybe lapse in my country because any adult can enter the casino after some security check but they do not ask for any identification document. Of course if the security suspected a person to be a minor then they have to ask him of his Identification card to prove that the person isn't a minor at all.
In the wild western movies which I think also show history where card tables are inside the salon or a whorehouse, people have to surrender thier weapons before going inside. That's kind of a KYC.
Lol, watching too much movie eh..

. Most of the created movies is part of the writers imagination there maybe some truth to it but most them are fiction.