Why would Bitcoin transactions be exempt from KYC?
You can also not comply with KYC laws in the traditional banking system; you're just going to get roflstomp'd by the financial authorities, c.f. $200mm fine for Deutsche Bank for insufficient AML/KYC controls in 2012-2015 time period.
Why would you imagine the result will be any different for crypto-banking? FinCEN is already promoting KYC for exchange-hosted wallets.
In many situations lack of KYC is a bug, not a feature.
Some people seem to be actually believe that.
You just happen to be one of them.
You don't.
Just like free speech, tracking what people do with their money is a violation of basic human rights.
Giving governments that kind of power is downright crazy.
If you want to catch criminals, resort to traditional ways.
Of course, as Bitcoin currently stands, it's difficult for this to come to fruition because most holders are speculators rather than people interested in using it as currency.