i see, now i know why mostly don't want kyc when it come using exchanges for converting their crypto to fiat because someone can trace them easily or report them especially if they're very suspicious as well like thus two couple.

and i wonder why these couples didn't even think about what will be the results afterwards before using an exchange that requires kyc because its a masive amount though.. Well its literally a epic fail for a fraud like them.
KYC is one of the ways used by exchanges to find out user data and overcome crimes such as fraud in crypto. Of course the pros and cons of KYC are many, but for those who don't want to use KYC it's their personal choice.
Everything will be traceable even without using KYC, because transactions will continue to be recorded and will eventually find out where the money is finally going.