You answered your own question.
Inspiration does not mean you take all aspects of some thing and create something else. Inspiration means taking certain aspects from something that appeal to you and tweaking them till you have your own thing.
In the case of Warcraft monks, Blizzard most likely took the mastery of combat from the Xiaolin monks and the focus on Zen. It doesn't mean it has to completely adhere to the complete real life definition.
And it certainly doesn't mean that a dragon can be called a tomato. The definition of a paladin in real life and the definition of a paladin in Warcraft are different. The same with monks.
EDIT:
As I said, and as the person you quoted said, the definitions of things within Warcraft lore aren't necessarily the same as the definitions for the same things in real life. You're getting hostility because you went along and said "well if monks can be called monks but they're technically not IRL monks, then death knights are paladins and Deathwing's a rotten tomato", which is ludicrous and simply proves your lack of knowledge on the distinction between lore definitions and real life definitions, as well as the concept of inspiration.