When your epistemological view is that all words are only representations of concepts of whim and not observation of reality, a lot of dumb ideas become possible, and Wittgenstein's is one of them. Woe to any person who gets lost in any of these ideas. If something in your gut says something wrong about a philosophy that's ultimate conclusion is "you can't say anything because you can't know anything", you should pay attention to it. To those who do, take the advice of your own teacher:

“Whereof one cannot speak, thereof one must be silent.”