Should Students Be Taught SWE?

I used to be a staunch prescriptivist. I used to think if anyone, ever, would want to read you writing it needed to be written according to the rules of Standard Written English. And I still think it is necessary for most everyone. Students should be taught SWE as it is the expected and most readily understood by all. Teachers will give higher grades, generally, for assignments written using formal conventions and businesses will expect the writing to follow the grammar rules set by prescriptivists. However, SWE is far from infallible. Often times, it cannot convey the nuances of speech as well as other dialects or create rich descriptions.

If every author, writer, playwright, student, never broke the rules, language would be readable but