From a science fiction writer, who should know.
So, yeah: In a film with impossibly large spiders, talking trees, rings freighted with corrupting evil, Uruks birthed from mud (not to mention legions of ghost warriors and battle elephants larger than tanks), are we really going to complain about insufficiently dense lava? Because if you’re going to demand that be accurate in a physical sense, I want to know why you’re giving the rest of that stuff a pass. If you’re going to complain that the snowman flies, you should also be able to explain why it’s okay to have it eat hot soup.
Read on for the Flying Snowman theory.