Probably because very few people have idetic memory to store 6GB of data in their brains with the utmost fidelity and unless you can also install a printer to y

Probably because very few people have idetic memory to store 6GB of data in their brains with the utmost fidelity and unless you can also install a printer to your brain, it would take you a long time to reproduce 6GB of data by hand from your brain. Transport method it is because it means there's hard proof and a paper trail of the IP theft that you can prove in court. Memorizing something has no paper trail and also leads to a clean room deisgn. That's why companies want to hire people or entire teams, to do clean room deign, without any of the original data. If I go watch a movie and then tell people what I saw it's fine. If I record the movie with a camera and show it on screen that's the IP theft.