Why is it important for scientists to predict earthquakes?

For the common man it may not be so important, but it is important for sailors and pilots. Well actually, predicting the weather is majorly important for people in the business of transportation. They need to know the conditions before they fly, sail, or ride in any other way. This can help any normal person so they do not plan major events like a wedding on a day that may have a storm. This also lets people know what clothing is necessary for particular days.