Is your argument HSBC committed a crime so everyone else should be allowed to, too?
And I doubt a significant portion of bitcoin is used for money laundering - it's mostly geeks, investors, and other early adopters holding it.
Another point was - the government generally doesn't seem to care about massive scale money laundering. I have no other explanation why nobody went to prison, and the fine was only $1.9B on $670B laundered.