Oh so that’s why you write fleshed-out characters
Because then when you realize that the plot you gave them is garbage, the characters yell at you, like “Why the hell did you add that guy at the end to deus the fuck ex of our machina when you’ve got me sitting here doing nothing? Don’t you think I’d be solving that problem?”
And you go, “Jesus, you’re right. Of course you’d do that. And that’d make a very satisfying resolution, wouldn’t it? Hey, that even means you can do this little thing too, which I really wanted in there but made no sense before.”
And then you write a cagey blog post about it because you don’t want to give away any of the good stuff, like the actual story that you think is worth someone else spending upwards of a million dollars on, and dozens of people tying their careers to (if only for a few weeks to a year), but you still want to brag to everyone that your story is no longer garbage. At the least, it’s some well-rinsed recycling.