In the hypothetical, when he becomes famous, someone making prints for $20 is $1,980 less than what he would be getting now so the damage is $1,980 per print. Both the purchasers of the print and the photographer are part of society. Under your proposal, some purchasers will spends $20 on a print that they would of have been willing to spend more than $2000 for, so the purchaser gained at least $1980 of excess value while the photographer gains $20. In your view, how is a purchaser of art gaining $1980 of value helping society?