A hump like this draws your attention when you look at her face, keeping you from seeing her other attractive features.  In the after picture, the nose blends in much better with her other facial features.

When you take a large hump off of a nose, it  can make the nose look longer, even if nothing was done to change the nasal length.  For that reason, it's important to make a small elevation of the position of the tip when removing a large hump.