As a project manager, I deal with risk on a daily basis – every project, no matter the size, has its inherent risks.
Risk is defined as an uncertain event or set of events, that should it occurs, will have an effect on the achievement of a project objective. The best way to successfully manage this is by identifying and acknowledging the risk to your project and manage it from the initiation phase. This way you are engaging with your risk from day dot proactively and not putting out fires every single day.
There are plenty of examples of projects that have gone bust due to poor risk management. The recent one that comes to mind is the 2016 Australian e-census, where the website crashed and could not be revived on the night of the census. It was a major project fail and a clear indication risk management missed the mark.