First of all, you should spoiler tag your post.
Second of all, I think most “plot holes” are stupid and shouldn’t hinder your enjoyment anyway. If a book eases your mind, nice. But for me, most of the time I don’t see anything worth fussing over.
My apologies. Post has been edited.
And to your point, I do agree that most of the time, plot holes are a stupid thing to complain about, but I am more speaking to bigger issues like character motivations or why something played out the way it did. If a book fixes an apparent problem there, then that is what I am speaking to.
Yeah I can get that. Things like character motivations should be clear in the text of the thing itself, not explained in an outside text. But things like “how does this piece of technology/magic actually work,” “what happens in this off screen scene,” “what is the backstory of this world, person, whatever,” etc. A supplemental book can add something there, but as long as that kind of info isn’t actually important to the story of the film, it shouldn’t matter.