See the video in the OP at timestamp 5:00 to 5:20. The review from The Verge touched on it as well; essentially, at the end of the day, it's still a bunch of displays showing you camera feeds of the real world. And both displays and cameras have a lot of flaws—low field of view, motion blur, pixelation in low lighting, and a much more limited set of colors compared to our actual eyes.
VR avoids this since they just make up their own designed world instead, while most AR glasses avoid this by having actual transparent glasses and reflecting images off them instead. The Vision Pro is more ambitious and tries to pull off both AR and VR, resulting in these compromises.
I never heard this complain before. Can you explain more?