Back at primordial age, our ancestors would rather run from the possible sound of predators than stop to assess the situation. It was wiser to err on the side of caution than to take risks.
We carry the same tendency now.
When a new business competitor emerges, we tend to do something about it rather than sitting to assess the situation first.
A doctor may prescribe something unnecessary even when the patients will recover on their own.
We can’t stand inactivity even if sometimes it is better to wait and see.