It makes perfect sense to me.
The Na’Vi don’t understand human technology and need someone like Jake Sully to lead them into battle.
Does it make perfect sense to you that all the main humans are played by whites and all the Na’Vi are played by non-whites? That’s a little too much coincidence to me.
And really...when they revealed that the mineral they were mining was called “unobtanium”...your reaction was?