Isn't it annoying to have to pass kyc every time you want to deposit or withdraw a little big amount? In this case, is it not enough to complete kyc once or twice a year? I didn't get any reason why you have to pass kyc each time you have made withdraw/deposit!
AFAIK having a KYC is just a one-time verification and those follow-ups are just for the security of your account just for validation I don't think so this requires to pass every time, also this is for your safety too. and if they just requesting you two times a year there's nothing bad with it. but on my side, as a user to I think it's good to only to have a one-time verification.
Think positive, Roobet do this just for ensuring your safety. They do not get any extra benefit if you verify KYC when withdrawn a big amount of money, Besides they have to do extra work for you to verify your documents.
If you lose your Authenticator device, then your fund is at risk and a stranger may try to withdraw it. So, in this case the only way to recover your funds is verifying KYC. That's why, if user start Betting Big amount or deposit big amount Roobet ask for KYC to verify you and give you permission to withdraw your funds safely.