1) That AML creates a massive honeypot of data for hackers, housed at institutions which historically have structural challenges with technology investment
2) The real, material downsides felt by non-criminals, as expressed by many others in this thread
3) That the sum total financial activity of criminals who would benefit from the lack of AML is likely a rounding error compared to money laundering carried out by banks like HSBC
4) The philosophical position that governments are entitled to dragnet surveil law-abiding citizens in order to combat crime