I would agree if they had actually lampshaded it. They had a couple of sassy characters that could’ve thrown in a line about how the name is stupid since it means something that can’t be obtained in Latin, or how it’s ironic given their mission on Pandora. Or how lazy the scientist were they couldn’t come up with something new or original (unobtanium is used everywhere on engineering). But no, they never address it at all. It was just there, no one reacted or called attention to it.

Or maybe they did and I don’t remember because it has a boring AF script and it is a completely unremarkable and forgettable film altogether.