Something I’ve thought about, over the years:
STAR TREK worked hard from Day One to create a believable sense of future technology without getting bogged down in the details. TOS didn’t even explain how the transporter worked until the third-to-last episode of the series. All of the technology was used in service of the storytelling, and also provided a sense of what kind of shirtsleeve, casual environment a futuristic spaceship could potentially be.
The later series got deeper into technobabble and physics and whatnot, but the storytelling was still (usually) the most important thing.
And it always should be.
If you employed any kind of realistic cause-and-effect, the series’ format would break down. Numerous episodes feature advances in technology (the Kelvans’ modified engines, etc.) which would completely alter how the Federation and Starfleet operated. Instead, most episodes simply hit the reset button, and ignored such advances. And, of course, the Enterprise could travel to both the center and edge of our galaxy in a matter or days or hours, which is simply not possible. Most famously, the transporter (and all of its contrivances and malfunctions) was invented so the VFX team wouldn’t have to show the ship landing on a planet, every week.
What I’m saying is that TREK has always (or until 2009, at least) worked to provide a believable sense of the future without getting bogged down by the strict and limiting requirements of HARD science-fiction. The fundamental purpose of STAR TREK as a storytelling platform (not a political one) is to have our heroes travel from one place and situation to another and explore the human condition by way of metaphors, ethical dilemmas, and character drama.
So, yes, we get the occasional plot contrivance or major scientific inaccuracy. And it’s a price I’m happy to pay, frankly. THE WRATH OF KHAN, for example, is a movie built upon numerous contrivances and coincidences. But I wouldn’t change a second of it, because the story of Jim Kirk facing death and overcoming his melancholy over getting older was worth telling, and has depth and heart.
At the end of the day, story and characters are all that truly matter. Yes, some contrivances are legitimate examples of bad writing, but many of them should not be deemed so important as to completely ruin the story being told. STAR TREK is thoughtful entertainment, not a science class.
…of course, none of this excuses the grotesque scientific gobbledygook of NuTREK. Because the future it presents is not believable, and the stories it tells are neither honest nor worth paying the price of our enduring said gobbledygook.