If my shadow web post hasn't convinced you then try this thought experiment:

You want to link from your webpage to Tim Berners-Lee's URI <http://www.w3.org/People/Berners-Lee/card#i>, except you can't because that link points to something that can never contain the #i fragment in its HTML. It can only ever link to RDF because Tim is relying on RDF's semantics for the meaning of the #i fragment. Tough luck if you can't read RDF or don't want to have to learn.