If the glass is standard float and it breaks, you will just get one long crack along it, like a stress fracture, but will more than likely stay together unless banged or pushed about with force. If it is toughened glass it will explode, but again will stay in tact until messed about with. There are so many rules and regulations on sealed unit manufacturing. The website is only telling you why this happens, so if you came home one day and you noticed your glass had broken, you would now have some answers to why. Also gives you a list of people who could come out and replace the glass for you as well.