You inherently get a better sense of the pattern since you can use stereoscopic vision rather than parallax+movement.
It could give you a better sense of what a complicated shape looks like. When you look at something complex enough[1] it helps to get as much information as possible. The eyes alone are not optimal for grokking it, even when the shape is moving around[2].
Because VR still sucks, and even good VR still messes with sense of proportion. Easier for most just to handle the object. But for complex or impractical to print items, it is a fantastic idea used by most modern engineering companies.
[1] https://images4.sw-cdn.net/product/picture/710x528_583780_19...
[2] https://www.youtube.com/watch?v=K9YAAS0cZ_w
also all hail king Quilez, master wizard