Well give up if you want to.

But the distinction is clear.

As you said 'A copywrite is someone's property'....and copywrite infringement is the use of that property without the owner's consent.

Theft or stealing is a different scenario. One in which a person is DEPRIVED of their right to use their own property.

If you don't see the difference there....I don't know what else to say.

Edit: I'll throw this out there too. Hip hop is based on copywrite infringement. It's an integral part of the conceptual artistry.