KYC is one of tools to secure accounts.
However, in my opinion, KYCs on young exchanges should be a optional choice. If users on young exchanges want to secure their accounts better, they should choose to do KYCs steps.
In contrast, if they don't have to secure their accounts at higher level, they should have option to reject KYC requirements.
In my perspective, doing KYCs on young sites are risky because we don't know exactly that how they end with. Maybe, in bad cases, they will end with exit scams simultaneously with our identities.
The only constant phenomenon in life is change. There was a period in the cryptocurrency space where kyc was not required. There has been many cases of fraud and money laundry which has made governmental and non governmental institutions emphasis the use of kyc. Even in offline financial institutions, kyc is now a requirement for opening accounts and I believe its here to stay owing to the benefits its holds.