Google fights authority for lots of things. In this case, they happily worked on non-trivial content-tracking and content-scanning code and subsequently handed over the keys to the YouTube kingdom to the MAFIAA.
Why? Because Big Content is now also distributed on YouTube. Google gets a piece of that action. That wouldn't have happened if Google hadn't agreed to clamp down on even the most borderline and questionable copyright claims possible.
Here's an example: my company wrote, directed, filmed, and edited a music video for a lesser known artist who is a friend. We did it pro bono because he is a friend. We posted the video to YouTube and he started using it successfully to promote himself and get more appearances. He's not making any money, but he is increasing his exposure and the hope is someday it will help him get somewhere. In the meantime, the video is garnering views on YouTube and we had it set to monetize. Our aim was to offset our investment even in the most minor way possible. The medium sized publishing company that he used to distribute his track turns out is owned by a bigger publishing company. That bigger company claimed they owned the copyright on the video. Google happily revoked our right to monetize it and gave us the option to take it down or let the bigger company monetize it. There's no one you can actually talk to at Google to dispute these things and it's all automated and played according to rules designed solely to favor the big content companies that revenue share with Google for hosting their commercial YouTube channels.
Since the publishing company didn't enter into any contract with us to produce a video, we don't stand a chance to get any money. We can take down the video and thus hurt our friend, or we can demand he pay us, which also hurts him, or we can leave it there and the publishing company, which didn't spend a SINGLE DIME to either write, record or produce the track (they just distribute it, and their reward is a cut of the sales), and which didn't spend a SINGLE DIME to write, record, or produce the video... just gets to sit back and monetize the video. It's peanuts to them. Shit, it's peanuts to us and wouldn't undo the time and money we put into the video. BUT IT'S THE FUCKING PRINCIPLE!
All thanks to Google buying YouTube and then not only not fighting the fight it should have fought, but actually working intentionally to hand it all over to the bad guys.