I was talking to a travel agent recently who asked me why some airlines cancel & others keep flying during things like "volcanic ash" crises.
I explained risk assessments, risk tolerance, customer care, safety etc
The response was that the agency had asked their Garuda contact why it kept flying to Bali when other airlines were cancelling. The answer to the travel agent? Garuda has "ash filters" so it's all ok.
I've asked my wider family to avoid Garuda in future if at all possible.