I dont think he never said anything about not trying?
Plus, I think you have to be a little more respectful of different peoples situations. For a lot of people, its not so easy - for eg I met an expat the other day who has been here for 2 years, and he gets by but really struggles. Works all day in english (with mainly other expats), has a family, lives out in La Provincia. Tries to do a lot of reading etc but doesnt have much time to attend classes and thus doesnt practice enough talking and listening. Hes an engineer, an intelligent guy. I reckon for him he would need atleast another 2 years before he got to a decent level, although he really wants to learn.
My point is, yes there are people that perhaps dont put much effort in, but perhaps for others its not so easy, they dont have Argentine partners etc or a lot of time to really integrate, they didnt come here with Spanish etc. Everyones situation is different.
Having said that, its obvious that it greatly enriches ones experience by putting an effort in and trying to learn the language, albeit I think most expats already know that