The leak unattended could develop into a major plumbing catastrophe costing hundreds of dollars. And that reader would be right. But it is a question of degree. These things are not likely to develop into extremes. Procrastination in major things can cause loss and suffering to many, and can jeopardize the country's growth and prosperity.
Procrastination is pernicious because it is often a silent sin.
No one but the procrastinator may know that he or she is guilty. It can be glossed over, and the act not performed, explained away with creative excuses. The person on the receiving end of the action which was expected but not delivered, is often powerless to retaliate. All the procrastinator has to do is smile and keep quiet. The good life is good.