...he Zepplin is a sitting duck, for an attack from above.
All he can see is the bottom of the gas bladder, quickly followed by large orange flames.
It may look that easy in films like "Flyboys" - but at least some of the airships
(there were various versions) had machine gun platforms "on their roofs".
And it's never a good idea to start shooting at an aircraft from a compartment that also houses the pilot.
As when gunfire is returned he might miss you, and kill your pilot instead.
So you mean all fighters/scouts were misconceptions???
But seriously - the air ship can remain afloat - even without it's pilot,
it can be steered back by the Captain or another crew member.
And the attacks from above were only a surprise when they happened first.
Later, the air ships could climb faster again.
They were not given up after early losses. Air ships were actually operating still in 1918.