Nebulous
Legend
As a player, it's simpler--or at least easier to put into words--but it still might not make sense to anyone not me. When I've played published adventures, it's felt as though my character wasn't moving through their own story but was instead moving through someone else's. Not necessarily the GM's--this isn't strictly about the published adventure being a railroad (though some are)--just not that character's story, or even the party's story.
Yeah, I get that. I almost exclusively run published modules now. The overarching story does lock the PCs into a track, railroad or not, XYZ will eventually happens, but the details of how to get there change. My brain likes having the storyboard laid out, and then changing elements to suit me. My players don't normally get very deep into their character backgrounds. They like seeing how the story unfolds, tactical combat, surviving a session and having a laugh.