This is usually an agreement most of those platform owners sign before the government can give them a license to operate. Basically, most platforms don't impose KYC; users have the right to agree or disagree, which is why it is very important to read the terms and conditions of any platform before involving your funds in the platform (CEX). It can only look as if the KYC is imposed on you when you don't read the policy before using the platform, and when you later find out about the KYC, it then looks as if it's imposed on you. Please note that no KYC is more or less dangerous; KYC is KYC, and all the danger that comes after is the same unless an individual's details are protected. Some CEX or other platforms can protect a customer's KYC details, but they become insecure when the platform is hacked or is probably not reputable.