Volcanic Ashes (Iceland)

Recently, an eruption of an Iceland Volcano has caused the ash emitted to disrupt air travel. Up to 4,000 flights are being cancelled with airspace closed in Norway, Sweden, Finland and Denmark among others. Many trips from Singapore to European countries have been cancelled. This has resulted in losses amounting to billions of dollars. This has caused many tourist to be stranded in foreign countries. This has also adversely affected the economy. Looking at the bigger picture, it shows that humans are over-reliant on advancement of technologies. Is this a good sign that humans are improving? Or is it bad to be reliant on technology? I feel that it is unhealthy to be reliant on technologies. No doubt they may bring convenience to us, but it has caused pollution to the environment. In the past, people travelled by horses and foot. It shows that people are manipulating the Earth's resources and for their own benefit.