> Law enforcement don't have free hands
> to decide what laws they enforce.
Law enforcement doesn't have enough free hands to go after every crime, therefore which crimes are pursued is always a choice. Resources are finite, therefore the decision to commit law enforcement agents to copyright infringement is also, at the same time, a decision to NOT commit law enforcement agents to pursuing trading violations on Wall Street, or income tax evasion among the rich.
In other words, with resources being finite, every decision about what to pursue is at least partially a political calculation. Ideally, that calculation may be based on social utility (in Jeremy Bentham's formulation "the greatest good for the greatest number") or, that calculation may be based on some corrupt influence of various political factions.
People like myself, who question the usefulness of these raids, are trying to raise the question "Is this the best use of our taxpayer dollars?" Given that trading on Wall Street recently contributed to the onset of the worst economic crisis since the 1930s, I would say the case for stronger enforcement of trading regulations would prove more useful than further attempts to surpress copyright infringement.