you cant refute a technological change that completely betters the current system just by saying it enables a practice that is a defining characteristic of the current one.
Not to mention that the privileged few can evade any significant punishment for avoiding taxes and laundering money in the legacy system. It's only ordinary people who are punished currently.
Yes. 'if' Bitcoin is a conduit for money laundering, it is one for the people: open, traceable, prosecutable and accessible by the *99%*. The TBTF banks have been proven to launder, rig and manipulate on a grand scale for the 1%. They are opaque, inacccessible to the majority and those ultimately responsible almost never see the inside of a cell.