…music. You hear a pop song in commercial, but that company doesn’t own the song.
…software. You buy software, but that doesn’t mean you own the code.
…blueprints. You may own the building when it’s built, but the architect owns the design.
…sculpture. You can buy art, but you can’t copy and sell it as your own.
The intellectual property is an intangible asset, that is, it is intangible as well as it cannot be defined or specified by its physical parameters. It is created by human intellectual or inspirational activity. Therefore, the intellectual property must be defined in some discernible method to be protected by the laws.
What’s your simile for photography licensing?