Value here is defined by how much it's worth to one (or more) people. Think of it as a price. It does not represent an objective contribution to humanity. Is a

Value here is defined by how much it's worth to one (or more) people. Think of it as a price. It does not represent an objective contribution to humanity. Is a seat in Orchestra section really worth 3 times more than one in balcony? Hard to tell, but some will pay that difference because they consider it worth it FOR THEM, therefore that's the valuation of that seat.