Yep, completely agree.
I had ear trauma which caused me 5 weeks of imbalance and nausea. Then I completely recovered except for a daily morning fluid sensation. At the time I was told by several doctors I had a virus. After trauma?! With sensations of fluid? Give me a break!!! Then 5 months later - bam! It all came back and worse. I was then diagnosed with MAV. Of course it was related and in my case caused by trauma. I had all the symptoms of MAV and as a bucket diagnosis that’s what I was labelled with. Even now many doctors can’t explain why it started with trauma and refuse make a connection. A little bit silly to say the least!!
IMHO inner ear virus explanation might as well be an ‘old wives tale’.
Medicine has a looooong way to go.
If you study the anatomy yourself you realise much more can go wrong.