I wonder how many people jump in real life? When is the last time you jump up a slight terrian increase opposed to just taking a bigger step?
Actually I jump quite a bit. When I go for runs in the hills I jump across dips, over small fences, or other objects in my way. If I didn't I'd have to slow down, which defeats the purpose of strengthening my black lungs. I also like to hop on top of ledges and walk across them as opposed to taking the regular walkway. I'm an adult, I don't act like a child all of the time, I just enjoy doing things that are more active. So it may sound odd to some people who do not enjoy doing these things, but for me it does feel awkward having to stay glued to the ground all the time.
This isn't an argument for jumping in FFXIV, I'm fine with it the way it is.