Dragon-slayer or Drunkard? [Common Meter]

I see so many statues of
dragon-slayers mid-kill.
The winged serpents pierced by a lance
conjures up such a thrill.

But there're no dragons, never were.
So, what were they slaying.
Dinos went extinct before our time
is all that I'm saying.

So, were they killing geckos, or
maybe a rock lizard?
Maybe chickens, given the wings?
Struck right through the gizzard!

Could it be St. George liked to drink
or was tripping ergot?
To earn so many statues, he'd
a publicist, I bet.

"The dragons were metaphorical!"
OK, that's really swell,
but shouldn't George's heroism
be figurative as well?