On the other hand, I can get really annoyed when writers get stuff like that wrong. Especially when it's crucial to the plot and it happens to be within my area of expertise. So I do appreciate writers that do their research.

I've consulted on a couple of books and I've seen two kinds of fiction writers. The first one simply starts writing and only stops once the story is done. They might get writers block in between or reorder some stuff in editing (if they do editing, some don't), but mostly the story is written from beginning to end in one go. The second one is the one that does plenty of research beforehand. They might have an idea of the plot, but it's more of a concept and not finalized. They start building plot points, characters and story lines. They decide on things like structure, pacing and point of view. Small details crucial to the plot get thought out and researched before hand. They write the important stuff first, then fill out the rest and make sure there is a natural progression from one point to the next. They make sure everything fits within the designed character profiles and backstories. Often they edit a lot and entire chapters get deleted and rewritten. This is the kind of writer that works with others, sometimes multiple primary authors, often other people that do the editing. I vastly prefer the second kind and love working with those people. I feel like they write better books, regardless of how much time it costs them or how successful their books are. But a friend of mine is the first kind and he's had some success with his books. He likes to let his creativity flow and outputs more books, so more chances of capturing an audience. But I do feel you sometimes need to turn your brain off a bit to read those kinds of books.