yeah kinda. but, you know, as long as you explain sth with tech words and scientific jargon most people will say they understand so as o not appear like stupid dorks. even if what has been explained is total bullshitt
so errmmm, I think that GL didn't consider that but only thought that parsec would sound cool. he couldn't image that SW would develop in such a phenomenon and that gee...eerrmmm...'fans' would go and question every word used in the story. personally I don't care if it really makes sense. if you're ready to accept that there are jedis, wookies, lightsabers, laser pistols, hyperspeed ships etc to do the kessel run in 12 parsecs shouldn't bother one much. and maybe in the SW universe parsec means sth completely different...