I would no more steal a car than I would tolerate a company telling me that they had the exclusive rights to the idea of cars themselves.
This did happen. A lot.
A consortium held the patent on the idea of a car, and would grant or deny the right to build one at the dawn of the 20th century. This patent was eventually fought by Henry Ford after the consortium refused to grant him a license.
Maganox held a patent on the idea of a home video game system. Atari, Mattel, Activision, and Nintendo all paid royalties to build a home video game
Thomas Edison held a patent on movies. Hollywood arose, in part, due to filmmakers running as far away from Edison as possible to avoid his patent enforcement.
I'm not defending infinite copyright, just pointing out that his example isn't as absurd as it seems. History is full of examples. And yes, I do understand the difference between a patent and copyright. The original author lumped the two types of IP together in his analogy.