Buying a copy of a work does not give you the rights to that work. Otherwise, we'd all be able to lay claim to the Mona Lisa, Picasso's Guernica, Gone With The Wind or whatever else we might have a copy of. Buying a tin of tobacco allows you to possess the tin art, enjoy it, nail it to a wall, or your car, but it doesn't give you the right to further distribute the tin art. Same as buying a book. You can read it, you can share the book with a friend, you can re-sell that book, you can nail it to your car, but you can't reproduce it because you don't own the rights to that work.
Without the protections of copyright and trademark, all intellectual property would be essentially worthless, since anyone would be able to copy and distribute it free of charge. That wouldn't leave much incentive to create movies, software, novels or tobacco tin art. Trademarks are even more reliant on those protections, since something as simple as a logo could be the embodiment of an entire enterprise. The Bengal Slices trademark isn't valued simply by the many hours of work that went into creating the tin art, it derives it's value from all the time and money that went into developing the brand (and the product) as a whole.
Without the protections of copyright and trademark, all intellectual property would be essentially worthless, since anyone would be able to copy and distribute it free of charge. That wouldn't leave much incentive to create movies, software, novels or tobacco tin art. Trademarks are even more reliant on those protections, since something as simple as a logo could be the embodiment of an entire enterprise. The Bengal Slices trademark isn't valued simply by the many hours of work that went into creating the tin art, it derives it's value from all the time and money that went into developing the brand (and the product) as a whole.