you're absolutely right, thats why its called science FICTION hence making the science involved false, fake, untrue, etc. science is not the keyword here, its FICTION.
so that being said, what "technical accuracy" are you talking about?
if you're talking about a real space shuttle, with real astronauts, with real science and facts that have been recorded and documented over all the missions into space, thats fine, i can live with that.
if you mean the FICTIONAL technical mumbo-jumbo made up by one gene rodenberry because he joined startfleet academy and battle the klingons therefore he technically knows what hes talking about because he himself broke the light speed barrier, made first contact and discovered the secrets to space travel and he learned all this technically accurate information from the vulcans themselves....stop kidding yourself. *takes a breath*
theres absolutely nothing technical about science fiction...its fiction, so you can basically make it up crap as you go along. wheres the science in that exactly?
But the science doesn't have to be fake. In fact, often it is preferable that it is not. Men like Poul Anderson and Bob Heinlein were scientists who used their knowledge to help write stories. Now obviously this is not the place for a debate on the definition of "science fiction." but needless to say, science must play a part in it, otherwise we'd just call it fantasy (and even fantasy requires internal logic and self-consistancy). It would be like writing a book of historical fiction and saying the US Civil War never happened; it doesn't make it an invalid story, but certainly disqualifies it from being historical fiction. Certainly some stories are more true to science than others, but that doesn't make it any less of a valid criteria of judgement.
Now, you personally may not give much importance to that criteria when judging a show or book. This is fine, but please keep in mind that there are those who do find it important. If you don't like it, that's your problem, not ours.