Most viewers have no idea who writes TV, what a producer does or much about how a show or movie is made. It's just not an important or particularly interesting thing to know, since most people don't live or work in areas where this kind of thing is done.
As much as I like to argue with you lately, I genuinely liked this. A lot of posters might try to make it an association with viewer intelligence or laziness, but you're right -- the production personnel are completely
irrelevant to the bulk of viewers who go to work/school in the morning, come home at night to eat dinner, then watch TV to be entertained before going to bed and repeating the cycle.
And you're right about the assumption that a fan base will reliably move from one show to the next in a given franchise, too. As much as I ended up loving DS9, I really didn't like it much at all the first season or so ... I even gave up on it for a while during the second season. But eventually, it grew on me. Same thing with
Stargate: Atlantis, although it never quite fired on all pistons for me.
If you look at the set of audience members who are
not fans of the franchise, then it's easy to see why they'd only sample the new show and move on to something else. If they're not fans of the franchise, then something else drew them in; a particular character dynamic, for instance. Or a regular location. Hell, maybe even just the timeslot. For every Trek fan who loves the details of the United Federation of Planets and Starfleet history, there are ten generic audience members who are just curious about the guy with the pointed ears, and if they don't see that one quirky thing that entertained them last time, they move on to something better.
Even fans behave the same way, although we'll give a show more time to grow on us. Some will leave when they see it isn't about Spock. Some will stay longer and leave when they see it isn't set on a spaceship, and some will leave when they decide Avery Brooks doesn't look like he's going to find his character any time soon. I'm very close to a die-hard. I'll watch anything with a Trek name on it. And even if I give up, I'll likely come back later anyway. Voyager was a curious exception ... I hated that show for the most part, but the effects were so frequent and so gorgeous that I hung on for the eye candy and the one-out-of-eight episodes that I actually enjoyed.