Why does it make him sound like a wanker? That’s a very uncharitable reading for no particular reason.
Let's put the same sentence:
"I'd love to explain to you, but if you haven't read $SOURCE_MATERIAL, you wouldn't understand it anyway".
Does it sound pompous and insufferable?
Of course we can agree to disagree. I'm not trying to win anything, but just express my perspective.
Have a nice day!
Politely pushes forward a freshly brewed mug of tea across the counter.