So about jump.

[Jacien]

Super Mario Bros. isn't trying to simulate a believable, living environment. Super Mario Bros. is a platforming game designed entirely around the idea of jumping on top of floating bricks. The jumping aspect is kinda core to what the game is about.

Got any other ridiculous comparisons?

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.