Because the earth is always shifting, seismic activity (such as the kind that causes earthquakes) happens everywhere. Although in many areas the risk of seismic activity is low, any risk must be part of a building construction plan.
Corrosion will inevitably damage metal - making metal buildings unsightly and unsafe, and in some cases even causing building failure.
One big advantage of fabric buildings is that they require very little maintenance. Many naturally occurring properties of fabric contribute to the need for little maintenance.