Who lies to you that they do not require KYC?
There are several Defi platforms that require KYC verification. Here are a few examples
1. Blockfi - https://help.blockfi.com/hc/en-us/articles/360048862532-Why-do-I-have-to-complete-KYC
2. Curve - https://help.curve.com/en_us/verify-your-identity-in-the-curve-app-rJqJVYKvK

In fact, I don't know why people even call then decentralized finance.