That's a poor analogy. The feature is built in to the cards that consumers bought, but Nvidia is disabling it via software. That's why a hacked driver can enable it again. The resident in your analogy is just freeloading off the contractor's transformer.

Nvidia does this so that customers that need that feature are forced to buy more expensive systems instead of building a solution with the cheaper "consumer-grade" cards targeted at gamers and enthusiasts.