As a pilot I take the view that if I cannot see it there is no threat!
Pace, how do you think the many SLF who read this website will react when they read comments* like the one I quote? Do you think they'll be reassured that there are intelligent, professional and safety conscious pilots in the pointy end of their aircraft?
Or do you think they might become worried that some pilots are treating this a little too carelessly.
Also, try flying at the altitude of the ash - it will be more visible then. We had some at surface level here yesterday, and it was visible (just).
*Which I hope you write in jest