well, when reduced to those terms they so seem to be similar concepts but needs and luxuries are not exactly equivalent, not to mention the difference between a tangible possession vs an intangible “experience” which have wildly different relationships, transaction types, and even grey area over what is considered piracy.
also, claiming society has agreed on these exchanges being “right” isnt exactly accurate. society certainly tolerates these exchanges, but to what degree has changed significantly in recent years. theres a good debate over intellectual property ownership, and whether the original idea is more valuable than the creation of the work itself. certain aspects of filmmaking, for instance, are recognized as being more significant to the finished work than some other roles (directors, cinematographers, etc) but the fair compensation of other roles which make no less significant contributions to the relevance of any work is a subject on which society cannot make a fair judgment without knowing the details of every relationship.
in the end, i believe piracy is and should be viewed as an organic market force which should prompt corrections in order to minimize, but due to the nature of the transaction it will never go away.