Finishing a chapter and realizing you’ve written it from the wrong POV. Sure, changing it around makes it better, but all that extra work does not advance the narrative a whit. Bummer.
That's why it's better to be a lyricist. Anybody complains about POV or =anything=, you give 'em the fish-eye and ask, "You ever hear ANOTHER SIDE OF BOB DYLAN, pal? No? I didn't think so. Give it a listen and then we'll talk again. Jackass."