The notion of lazy pessimism is not a pure concept, in the sense that it did not emerge in someone's mind independent from any argument or bias. Who's interest does this notion serve? In which argument would someone use this term and why? And who are we really talking about.

Honestly, it made me squirm. Sounds like a conservative on the freshman debate team trying to sound "compassionate." Like, those Mexicans aren't lazy. They just need to realize that their attitude needs adjusting (said the guy who knows not one person from Mexico.)

This is more clever than deep and certainly less thoughtful than it might seem. Read some James Baldwin. Please.