There's a good modern day example we could look at. Reggae music. Jamaica lacks (or did) copyright laws. Because of this, music was reused over and over again. From the 1950's onwards, kids, poor people, anyone with technical knowhow could build a soundsystem, cobbled together from spare parts, get some records and play music. Eventually, many of those people went on to form recording studios and such. Because there was no laws against it, music was widely taken and reused amongst different studios, to the point where these same songs are still being remade today. Because of this, many, many people were lifted from poverty and were able to make careers from this, to the point where reggae has become a global phenomenon, primarily outside north america, where people are still taking these songs and making new versions of them.
Over the years, because of this system, not just the original creators, but hundreds if not thousands of people have benefited, profited and bettered their lives because of music originally recorded in the 1950's and 60's by people, in many cases, long dead.
Under the north american system, the copyright owner would have made millions of dollars, and entire genres of music would.never have been created in their current form.
The value to humanity in that situation far outweighs the profit of the original creators.