My guess is it's partly that but also mixed in with aligning to their mass market consumer ambitions. I've given my Quest to countless people to try out and wh

My guess is it's partly that but also mixed in with aligning to their mass market consumer ambitions. I've given my Quest to countless people to try out and while every single person is blown away, many / most of them are challenged to use the controllers as anything more than simple pointing devices without significant training. With hand tracking that all goes away. You just use your hands how you normally use them and it "just works". It's similar to how the original iPhone captured everybody's imaginations because it offered such intuitive gestures to control its UI. If you see the Quest as their "mass market" device and then you consider that their top priority is to knock over every barrier that stops it spreading like wildfire, then it's a no brainer to eliminate the controllers.