Fire is the most common reason someone may need to escape through a window, but there are several other circumstances that would be no less valuable, such as escape from noxious gasses or an intruder. So, when your home inspector reports an under-sized or high bedroom window as a deficiency in your home, bear-in-mind that it is your family or occupant safety that is the top concern.
 
Note: To help provide fall protection for occupants, the top of the sill of any operable window that is greater than 72 inches above the finished grade outside shall be not less than 24 inches above the floor.