Well, you mustn't take that too seriously. It was written by a Frenchman in a jail cell and is pure poetic license. And surely our Merlin is even less like his literary counterpart; and we like him quite well for it.

[If anyone's like Merlin in that story to Arthur, mightn't it more be…? Living backward in time and all that. …Or was that T.H. White's version. You'd think they'd cover these in more depth at Hogwarts, but in fact these versions were thought of more as fanfiction than foundational texts.]

At least you'll understand next time I forget myself and use his name as an expletive. It's nothing personal.