I think the key here is that it isn't Google that decides which music can be pirated -- there are laws that require them to comply with these kind of requests.

I think the key here is that it isn't Google that decides which music can be pirated -- there are laws that require them to comply with these kind of requests. Such requests do not exist for the example you mention (law companies), and as such, Google is not required to comply with our requests. In other words: blame lawmakers, not Google.