[Bob]

I’m from Oregon. People fly through clouds thicker than this most days of the winter.

While perhaps thicker, I'm quite certain that your Oregon clouds don't have the abrasive characteristics of a volcanic ash cloud.

[muawiyah]

Bob, there are people who simply refuse to believe that transparent stuff like caustic gas can damage stuff and kill people.

Their view is that if you can't see it, it doesn't exist.