Maybe Earth is the only planet where people needed Jesus. All the other planets listened to G-d and obeyed him.
Exactly right. And this would certainly demonstrate the extraordinary love of G-d... that of all the thousands of worlds He created and turned out “good”, the only one that went “bad” (i.e. earth)... He didn’t just blow it away, but decided to go to a huge effort / sacrifice to provide a way for it to be saved. Unbelievable love.