I think it's safe to say that the Vision Pro v1 is - in Apple's opinion - the minimum viable product for spatial computing. It's why it costs as much as it does, as Apple didn't spare expenses on the screens, processors, cameras, etc.
If Wifi 6E was a showstopper for this, it would be in there. But quite clearly, in Apple's opinion it is not. I am inclined to believe Apple on this, but obviously time will tell.
In all likelihood, it will have zero impact on it usability but HW bros here will use any excuse to promote their narrative of Apple as a corner-cutting greedy monster.