Just like every game, using realistic distances has a huge set of problems... if you make the ranges realistic, then you need to make the distances in combat realistic, and if you make that realistic then you need to make the distance between areas realistic etc.., and then you'll end up with a game where you have to spend hours walking around to get from one place to the next. It's pretty normal for video games to tone down all the ranges of everything, because it just doesn't leave you with a good game if you try to use realistic ranges.
Also, as if high ground needs to be buffed - it's already ridiculously overpowered and definitely is not in need of any help.
