You have to look at the reality. Crypto has been used overwhelmingly for scams and crime.
So has regular currency.
These transactions while not the majority of transactions I would wager is far larger in terms of dollar value that the whole crypto ecosystem.
The reality is that criminals will find loop holes in a system and they will exploit it if it is worth exploiting. Many of the checks done in banks now impede transactions. I was buying a car (private seller) and I couldn't transfer the cash without going through a fraud check, even though I had signed the transaction with a card reader in the app. It turned a 30 minutes of test driving the vehicle and checking docs into 3 hours of wrangling on the phone. BTW I am not the only person having these problems with banks in the UK.
As for what crime we are referring to as well in this scenario needs clarifying as well. I suspect that most of crypto transactions are through darknet drug markets. These markets reduce the risk of violence to basically zero when purchasing drugs. While I am not one of these people that is pro-legalising all drugs, the reality is that people are going to buying them.