Earlier quoted context omitted.
This seems to be very subjective. I can wear the Apple Vision Pro headset for hours without it feeling uncomfortably heavy. I'm not sure if that's because I just happen to have a good light seal fit, or if it's because I spend a lot of time in VR on other platforms and am more used to it?
Depends also on how you sit. If you've got straight posture sitting in an office chair the weight of the headset is not cantilevered. If it is the end of the day and you want to splay out on the couch and watch TV or play games it's a different thing entirely.
To watch a mini NBA game on your coffee table you aren't splayed on the couch leaning back.