For the moment, Roobet is one of the only sites that you need to fill in some personal information when your register. But in the end, a lot of casinos require KYC when you want to withdraw some money (even small amounts). I have needed to complete a full KYC to withdraw 0.01 BTC.
This is a very sensitive topic. Some gamblers have no issues providing their KYC to Roobet like you since they trust them because of their proven reliability over time, but some gamblers aren't willing to provide any form of KYC regardless of whether they like the site or not.
What I truly find weird here is the requirement for you to complete full KYC for just 0.01 BTC. This doesn't really make a lot of sense.
Did they suspect you regarding something? Can you clarify?