And, again, a lot of it just comes down to execution. Compare the exposition in, say, Star Wars: The Empire Strikes Back to, say, Star Wars: The Phantom Menace. No one seems to mind Yoda explaining The Force to Luke, but people cringe when Liam Neeson starts talking about midichlorians. They're not that different. One is just done much better than the other.
While I emphatically agree with your point, there's a LOT more going against the latter example than that...
That's very fair. I initially was going to use examples from my own stories, but that sounded awfully obscure, so I went looking for a different reference which I hoped everyone would be familiar with.
One more comparison, just because. Think about
Casablanca. Compare what we get to see about Rick's time in Paris, which is fairly substantial, versus what we get to see about Rick's life between leaving Paris and coming to Casablanca, which is essentially nil, aside from this one tiny exchange:
Captain Renault: What in heaven's name brought you to Casablanca?
Rick: My health. I came to Casablanca for the waters.
Captain Renault: The waters? What waters? We're in the desert.
Rick: I was misinformed.
We need to know what happened to Rick in Paris. We don't need to know what happened to him in the interval. In fact, as William Goldman pointed out, imagine how it would feel if Rick told us his sob story right there, how he moped around Europe for a few years, bouncing from bar to bar, trying to get over his lost love, before he washed up in Casablanca. It would hurt rather than help.
That's The Force versus midichlorians in another form.