While this statement is true, it ignores a rather important fact about bayonet wounds. A soldier who has received such a wound generally dies on the battlefield. What has always been rare about bayonet wounds is the victim living long enough to be seen by a doctor in a field hospital.
You might ask yourself these question: Since bayonet wounds are so infrequent, who bother to issue bayonets to soldiers? Wouldn't it be more effective to give soldiers more bullets?