A motorbike helmet is heavier (3kg), but the weight is wrapped around your head, not hanging in front of it.
Yes, that's what makes the weight bearable.
Same way the Quest Pro for instance splits the weight around the head to achieve a good balance. Better bands will also help.
At this point we have none of that for the Vision Pro, which is a choice Apple made.
A motorbike helmet is heavier (3kg), but the weight is wrapped around your head, not hanging in front of it.