Wire fraud results in billions of dollars in losses per year from checking accounts. Here's one article from 2019:

https://www.cnbc.com/2019/09/11/email-wire-fraud-cost-26-bil...

We talk about eth/btc as if they're just covering the function of the checking account, but it's also covering the function of the checks, wire transfers, ACH transfers, etc. So for a real comparison you'd have to count up all the related fraud from legacy checking accounts and their various mechanisms to move money between them.