I'd mostly agree, but the particular criticism that you levelled isn't very well-founded. Questioning the way we use language and the way that philosophical questions are put is not the unheard of idea that you portray it as. In fact, it's pretty standard. It's just not necessarily the stuff that people choose to put into most "Intro to the Philosophy of X" textbooks, since there's usually more discussion to be had if the question is well-posed!