Airline give you an ETA (ESTIMATED time of arrival). It's not a guaranteed arrival, and there is nowhere you will see that they guarantee you will arrive at that time. As I asked earlier, would you take a road trip that is exactly 14 hours long without any traffic etc (perfect circumstances), and leave exactly 14 hours ahead of time, or would you plan ahead and give yourself extra time for unforseen circumstances?
As far as your comment about being compensated, the airlines do compensate people when they have to bump you, or of your flight gets delayed/cancelled.