Of all the architectural elements in the fiction writing process, plot is the primary scaffold. Without it, there is no story. There are some writers who begin with characters and evolve a plot from them, but it all has to come down to plot.
I'm fairly new to the writing process myself, but I'm an old analyst, steeped in software tech, and lately I've been contemplating what it is about plot, the way it's used by writers, that makes it special. Why do people struggle so much with it?
I'm not sure what “writer's block” really means as it's commonly described. When I'm not writing when I should be, it's almost always because of external factors (stress, depression, etc.) Only rarely have I been able to pin it down to the work itself — when I've produced a scene in first draft, and something about it feels false to me, I can't continue until I resolve the problem.
My analytical brain has been chewing on what's going on when that happens.