The claim wasn’t "BitCoin is for illegal things (and by comparison, USD is never used for crime)", it was "BitCoin's lack of support for KYC makes it more likely to be attractive to criminals and therefore likely to have its use criminalized" which you CAN'T just hand waive away.
Your point being what? That because USD is uncommonly used in ransomware it can't be used to commit crimes? Do you really think that no extortion has ever taken place via USD? Because I can guarantee you that money-related crimes and scams happen in just about every single form of currency, even things that technically aren't even currency like gift cards.
Way to skip over the different potentials for abuse and just dive to the cryptonerd's handwaive argument.
Looking forward to your insights about rubber and glue.