Because the other big media companies are dinosaurs from the last century. Game companies are relatively young, and understand computers (duh). In the last century, media was one way. You had a newspaper printing plant, a vinyl record factory, or a film studio. Content went from them to you, and their entire system and mindset is built around that. Computers and the Internet are two way devices. Even standalone computers have a way to spit out a disk or thumb drive or something, and anything online of course can upload as well as download.
Sites like Tom's get it. There are forums, they respond to feedback. I do design work, and I communicate with my customers directly. Big media trace back to the era of book authors, stage plays, and musical concerts, where they don't communicate with their customers, it's "here is my creation, I'm not changing it for you", it's just a totally different mindset.
Their problem is trying to act like it's a one way world, when it really is a two way world. It's like thinking the world is flat when it's really round, their basic assumption is wrong. When you make that basic a mistake, you will fail. It's just a question of how long it will take. SOPA and laws like that are an attempt to make everyone else think the world is flat.