So about jump.

[Arcell]

I bolded where the silliness comes from. You're playing a Final Fantasy game. There are countless tropes that break the concepts of a "believable, living environment."

And overall, the most important thing: It's a video game.

Well, it kind of depends on what you're defining as believable. I'd say anything that is considered possible in the game world would be believable, not that which is believable in our world. If you're going by the definition of our world I'd say that's more realism.

An example would be, casting magics is believable because the game world treats it as something you can do. It is a generally accepted thing that can happen in the game world.

Invisible, unnamed forces restricting access to/holding up tents is somewhat unbelievable because there is really no explanation of it in the game. It's a thing that sometimes happens, sometimes doesn't.