The fact that a game is built with a smart contract is not enough to call a casino decentralized because the guys who generate that smart contract are the ones who create the rules of the game and the ones who will get profit in the long run. I don't see what doesn't have of decentralized. I mean the community can't change the house edge, that would be a good example of how a decentralized project works.
For me, all of them are centralized, but they use different technologies to operate, that's all.
Some smart contracts are built this way. The developer can decide if he/she wants the profit to be transferred to his/her address, or remain on the contract itself (to pay for gas fees, etc). Decentralized gambling could have a future if governments start cracking down on centralized gambling sites (particularly those dealing with cryptocurrencies).
Gamblers will ultimately decide which kind of casino or gambling site is best for them. As long as gambling is done in a fair & responsible way, nothing else matters.
I remember that a few years ago people thought that they could fight against governments, they thought that governments did not cause fear and that therefore they could create financial services without worrying about things like licenses, kyc and money laundering. With this thought, many exchanges, mixers, icos, defi and crypto casinos emerged. but governments started to show their great terrifying power by learning the mixers and their creators and the dark web guys and to show the terrifying power that governments have, and that the courts when they judge these mixer owners, they impose prison sentences heavy, with few charges such as money laundering, operating an unlicensed website and then putting many years in prison without rights to freedoms so soon, they look like terrorists being tried
And the problem doesn't end there, as these are crimes committed on the internet, soon other countries will also introduce high prison sentences, so the person will be sentenced to prison in many countries, so the person will die in prison. This means that someone who wants to operate a casino must follow the laws, get a license, do KYC so that in the future they don't see their casino being seized by the government and the owner being arrested and left in prison until his death. Honestly, in my opinion, I advise all casino owners to respect the laws and not create anything that could lead to imprisonment, because it's not worth defying governments. and a fight in which the person loses