We expect a certain about of editorial bias from newspapers, and we accept that individuals are going to have their own biases, but it's often not obvious whether a generically named organisation is tied to an ideology or not. This isn't a dispassionate report written by someone who incidentally holds certain political views, it's a report written with the express purpose of influencing public policy in line with a specific ideology. Knowing that is important in judging its conclusions, just as knowing whether a report on climate change has been funded by a windmill manufacturer may alter your impression of its claims.