Monitoring failure patterns and regular health checks of your infrastucture means that you can identify any discrepancies within your systems and understand correlations.
Taking a proactive approach to monitoring involves more than taking information at face value, just beacuse your network is functioning it cloesn't mean it's running efficiently and future problems won't occur.
IT monitoring is more than just ensuring that your IT infrastructure is working as it should. Monitoring is a vital element in creating and shaping your overall IT strategy.