Because I don't know how literal you want me to get with it. And the technical difference between the two would probably be a very long dragged out explanation if you don't understand already. Which is why I tried giving another analogy which wouldn't take much time. In essence, it's watching virtual vs watching real. But it's deeper than that. Like why would you ever go to Paris when you can now just look around the Eiffel tower in a vr headset. There's a difference. And it's intangible.