I recently enrolled in a philosophy course in university wherein the class was introduced by the professor (who is a metaphysician) who explained that philosophers like Kant, Hume, Locke, Hegel, and so on, were "all just bad philosophers." His reasons for saying this (according to him) was that their arguments were not communicated in a sufficient clear form (i.e. using the toolbox of a modern metaphysician).
I have also heard metaphysicians talk about how "everything we do is really just metaphysics" - and other such statements that sound self-important.
My question is: What is the reason for this apparent chauvinism on the part of metaphysicians? Are such assertions even justified?