This is very far from truth unless you only listen freshs pop music. And even then it is easy to click a song only to receive "not available in your region".
Yes, same can be said for Vkontakte, for example (thanks to its piracu police and user uploads)
But this is kind of a different story.
Likewise at somepoit Russia passed a law that made all soviet movies and cartoons public and obviously studios started using YT as their hostding platform.
But this is not a default case. Just a lucky coincidence.
TPB were actively advocating and facilitating the upload of owned content. YT reacts to takedown requests and even re-directs advertising revenue to the rights holders.
You know TPB is a company right? They even run a paid VPN service. And half of their business was "bulletproof hosting".
Plenty of pirate material on yt, and I couldn't care less about what organizational format tpb have. I'll support them against Google every day of the week, since they are not hellbent on creating a socialist surveillance society.