Nice little Opinion piece, but this 2013 University of Kentucky study on the economics of hemp farming would beg to differ, especially with regards to hemp fiber:
The document was drafted in 2013, and in US (as you know) the market was blocked for hemp.
In any case, you will find that in Canada the main product were the seeds (p 6,7,8 ...) for lack of fiber processing plants.
"There are many companies interested in using processed hemp, both fiber and seed, but, in Canada for example, far fewer have invested in doing the processing, especially fiber processing."
Bruce reported the same news after traveling in Canada.