Gambling addiction cannot be reduced through KYC; having my biodata will not mean that the casinos knows what is going on with me. So I don't agree with your hypothesis because it's only an addicted gambler that can tell you that they are addicted.
Who said KYC will solve gambling addiction? Never underestimate the psychology of betting patterns, which can be seen through on-chain gambling activities. Oh btw, even an addicted gambler can't tell that they are addicted, but their gambling activities and patterns do.
The statement below is from your post and if I still understand English, it means you are supporting the opinion that Blockchain and KYC can be deployed to handle self exclusion and by extension gambling addiction. That was the statement I referenced in my comment. If the statement mean something else, then make me understand.
" It is studied that gambling addiction can be addressed by integrating Blockchain technology coupled with KYC to trigger an automatic self-exclusion program."