Warding/Autoattacking over walls

Whenever you target a champion on the other side of a wall, or try to ward over a wall, but aren't in range to do so unless you just walk a step closer to it, the game chooses a path to walk all the way around on the other side of the wall. Is this supposed to be like this? Because this is really annoying. Like for example Caitlyn when you want to Autoattack baron from over the wall (wich is possible from that one spot, as you of course know) unless you are acctually standing on that spot, but just a pixel away, she chooses the long route around instead of the shortest one. Should something be done about this or is this purposely left alone to add a litte more "skill/knowhow" to the mix.
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