It’s actually kind of funny that I was actually thinking this exact same thought earlier today when I was running my Thief through the Whispers story today. While it was definitely confusing at first, the mob density in that part of the zone was thankfully low enough that I was able to make a run for the quest location with little to no problems.
Admittedly though, it is a little weird to have such a level difference like that. Though the geographical location probably plays a large part of it, and the proximity to the zone entrance ensures that you can reach it pretty easily.