Must a fictional story be logic driven? I mean yes. Every story must have some sense of logic in it. But because it's a fictional story that means we don't necessarily need to apply logic all the time right? I mean look at how illogical anime is and yet its so successful. What do you think?

I don't think I'd compare anime with decent fiction.

Understand this: When a reader picks up a book he enters into a contract with the writer to suspend his disbelief and enjoy the story. It is incumbent upon the writer to keep to the facts and the possibilities within the parameters of his story.

So he can write about Dhaleks, or Ewoks, or Hobbits, or any other impossibly fantastic creatures, but he must have them act in accordance with the abilities and environment he has set for them or his readers will tear up the contract and throw away the book. Laziness in writing just doesn't cut the mustard.