why is it troops don't go over fences?

[wtfbollos]

why is it you can direct a soldier to jump a fence when you get the little orange curved arrow thing, but if you instruct a soldier to go to a location, he walks AROUND, sometimes a laughably long way, instead of simply go direct and jump the fence/wall/whatever?

damn annoying when you send someone somewhere and turn your attention to something else and come back a few seconds later to find him dead cos he ran a stupid way and met some enemy?