Phenomology of Error response

Joseph Williams' article brings to light the problems with errors in the world of writing in general.  It is commonly taught that in order to write "correctly," there must not be any errors, whether it be punctual, grammatical, or structural.  But is this really the case? Williams' goes on to point out that constantly worrying about errors may effect what the writer is trying to say, or how the reader is taking in the article.  When only focusing on the "errors" in writing, there may be main points inside the writing that are being missed altogether.  If the idea of what the writer is trying to convey can be distinguished, even amidst an error-riddled writing, than this can still be considered a success.