Creating a d&d campaign is difficult, and publishing it in a way that communicates what needs to be known is tricky. It’s almost the opposite of a novel. In a novel you need to save twists and turns until the end. In a d&d campaign the DM needs to know them all from the start. But you also don’t want to overwhelm someone with too much information. But you don’t want someone who is following the module closely instead of using it as inspiration to “write” themselves into a corner because they didn’t know something would happen in a specific way later.

The main published modules for 5e are all a little different in how they present everything. Some may be better than others for certain DMs and certain groups.