Otherwise you end up in situations like this where innocent people are going to get screwed over because they utilized a tool that criminals utilized. This isn't fair or just by any standard and I personally don't accept the collateral damage as worthy.
This doesn't even begin to touch on the vast majority of laundering that happens in fiat across international banks . That would take a while just to list all the infractions that are constantly happening, yet those entities are still not only operating in the free market, but they have federal insurance and backing.