It would be annoying to have to get use to a different hight of jumping for every planet you visit, so it is just easier to make them all the same, then you dont add another heading for no reason. Here is a potential explanation, since it is the future you are able to generate a kind if gravity field, that can be made higher or lower depending on the situation, it automatically does this, and is meant to always make if feel as though you are on earth, so then while in the middle of combat you dont have to worry about jumping and floating away. I put this as a reply, then realized it would be better to put it in my actual post