KYC will be in all this things that are near cryptocurrencies - casinos, exchanges, marketplaces, etc. This is reality and we have to deal with it. It works in real life business and soon in the cryptocurrencies will be the same. The casino without KYC will mean that we can`t trust them.
Private data can become a problem even when you use trusted reputable casino. But this the same with the common business - hackers can get your private data in both choices.
In the future, not all casinos or marketplace will implement the KYC/AML and it doesn't mean either that every casino, marketplace, or store that didn't implement KYC shouldn't be trusted but people have to do research about the casino, marketplace, and store they wanted to use. Mind you, there's a casino on this forum that also implemented KYC, and everybody that participated in their campaign is red-tagged.
About privacy data being a problem if private information of users gets stolen by a hacker, this can be minimized if people can maintain the KYC tier level in which only their residing information is needed to perform the KYC.
There are big casinos in this forum that don't require KYC to their small time players.
But it doesn't mean, they are not trusted. It depends on how they build their credibility in this community.
There are even several long-time casinos here which are not yet licensed, and yet, they have loyal patrons that are continuously playing.
But if you do happen to submit KYC to a casino, better make it worth your risk and you have done your homework.