People think they make the right decisions, but they don't think over them repeatedly. They think that if they do make the wrong decision, there is always an opportunity to fix it. What if they are wrong? What if the universe decides you don't deserve a second chance? What happens then? You have to realize that what you have lost never comes back. The simplicity of this is that it is too late to make up for your life changing decision. All that is left to say is a sorry and a goodbye forever.