Boris Grebenchikov about copyright: "Art must belong to the people"

Or the evil pirates, they steal, you know... I never heard that any pop star (not to mention the barista) died of starvation, just because her album was posted on torrents. If you don’t want a song "stolen" – don’t sing it to anyone. Close up in the sort and whisper to yourself. This is vocal onanism.
When we talk about pocketers/fraudsters and other similar scams, we are always talking about a specific amount of damage. Prove that by downloading a song on the Internet I deprived its copyright holder of some amount of money. What does it mean: "I didn’t buy the album and thus..."? Did I gather?