That statement reads very much like the opinion of someone brainwashed by military training.Tends to be true and is a phrase often used in military circles where realism favours the use of words such as 'Should', rather than 'Will" and you will rarely see certainty expressed over a future arranged event. That's not to say there won't meticulous planning involved, for the potential problems that might arise but in the end, experience and training will make it alright on the night. That's confidence, not a lot of that on here I note!
Tom