Probably not all. There will always be a few exceptions. Most casinos are centralized. So they need registration with the appropriate government agencies and regulators. They don't have a choice but to follow the regulations. But the thing with gambling is that it is now closely intertwined with technology. So it is changing along with rising innovations like decentralization. That is partly what the web 3 integration in gambling is about.
A fully decentralized casino would probably be the most preferable option for a gambler, i.e., without any verification and restrictions on jurisdictions.
It's true that some gambling platforms have a combination of centralized and Web3 functions, but unfortunately, the centralized components are still prevalent at the moment.