It's not actually the weight. I have a Quest 3 with a BoboVR head strap, external battery, etc that all add up to be heavier than the AVP, but I can easily go for multi-hour social sessions with that on without any physical discomfort. You can put a ton of weight on your head with perfect comfort as long as it's balanced properly.

The AVP's real problem is that its ergonomics are just shit. As with a bunch of other things, they designed for the ads instead of actual usability, so it's significantly worse than headsets that are actually much heavier, and the earband design with the way-too-far-back connectors and no top connections makes it nigh impossible for third parties to improve on it.

The closest thing I've seen to making it comfortable is the third-party ResMed Kontor headstrap, and that's being produced in such low numbers that it's functionally impossible to actually buy.