Because they just asked us to submit kyc for security purposes.
However, if possible, I will try to avoid using KYC. There are many risks involved in submitting your personal information to KYC
You are right, it is to reduce cheating. In addition, KYC is used as a filter to select people from certain countries that are protected. sometimes I worry about my personal data being abused, so my suggestion if there is KYC, developers prepare an agreement in which the data we provide is guaranteed confidentiality.