Look, most of vestibular medicine is defined by “symptoms” and “theories” … BPPV does not exist as an objectively observable physical manifestation in your inner ear, it’s just a story told by medics to explain something (just like the rubbish pass off “it’s a virus”). It’s a reasonable theory, but there are big holes in that theory.
I’m becoming more and more convinced, this entire condition (for most people) could well be down to some kind of inflammation, constriction or blockage in the ET that is causing alternobaric vertigo - the inner ear is put under unbalanced pressure on one side and your brain interprets that as spinning (ie there is nothing whatsoever wrong with your inner ear!)
Open to debate on those linked Topics!