Vr is very price prohibitive and Oculus/Facebook sell headsets at a loss to make their marketshare. Its not great but if you want to "try vr" especially something you hear will make you physically sick to use and you might not even like. Its just logical to spend the least amount of money on it for a "proper headset". Like if you value your privacy that is fine and completely understandable but lets be honest here, most people don't. Especially with the popularization of social media and smart phones like we can even apply the same logic with your argument with phones like why would you buy a device that has so many cameras and microphones and wave it around your home and toilet. Hell I think the phone is actually worse since most people bring them everywhere while a headset is a bit more constrained on where you can take it.