They are probably outside of US jursidiction and also seizing servers is much easier than catching a cybercriminal who actually knows how to cover their tracks.
I don't understand the criticism, could you explain why you view this in a negative light?
In this case, the comments seem irrationally critical, to the point of being unconstructive.
I'm not sure the analogy applies perfectly anyway, since it was "only" a single "fire" in which "only" 700,000 victims were affected.
Do firefighters perform law enforcement duties in your jurisdiction?