@Andrew3407 I agree with everything you say. It's really an empty metric if you think about it. How can AirBnB come to you and say, 'hey- you're getting low value ratings- something needs to change.'
They can't.
The most important thing about the value rating is that a host deliver the property as promised. If they do so, then the premise is that the guest agreed to the price when they booked, and therefore agreed to the value.
The only "if" in this equation, is if the host doesn't deliver as promised, i.e. an amenity wasn't available or working. If that's the case, then the guest has grounds for downrating the value, as in, 'I booked and paid based on being able to do or use a certain thing, and that thing was not available. Therefore, I perceive a lesser value to this reservation.'
Even then, value isn't a good measure of that situation, because they will generally lower their overall rating if that happens.
I'm with you on this, although reality with AirBnB is that they spend a lot of time "updating" things that don't necessarily need to be updated, while not affecting any real change inspired by users.