You can RP around anything, that really isn't a compelling reason to keep something in.
I have to agree with the implication of the "this is not Middle Earth" statement though. Tolkien has his own fantasy world and TES has theirs. In Tolkien's world elves are immortal, sounds pretty unrealistic to me. Bethesda is not really limited to what they want to do in their games fantasy-wise. They would be WISE not to make huge jumps from reality like humans being able to jump super high or stuff like that in canon because it reduces the believability of the fantasy.
lol, really? So when someone makes a good point it's suddenly "who cares about him?". The idea that an Acrobatics of 100 lets you water run is not lore.