How do you know that, Airclues? The Finnish F18s and (Belgian?) F16s were flying in similarly clear conditions when their engines were damaged. This is the problem - it's not just flying through visible ash that can wreck the engines, and we don't know what the safe limit of contamination is and we have no way to monitor the actual contamination levels - we're blind on both counts.
As I and others have repeated, the damage is cumulative. I don't expect to see any engine failures today, but I am concerned that multiple failures may occur in the coming days or weeks.
People are being blinded by machismo and economics.