I agree with this, aside from it mattering that she's white. The story would have garnered attention whether she was asian, latino, or black just because she's pretty. It doesn't mean her life/death is any more meaningful, people just have presumptions about attractive people.
I was married to a woman for several years who suffered from depression and suicidal thoughts, and there are parallels between my experience with her and Madison's story. The first being that depression like this is an unreasonable condition. It is illogical and will never make sense to those who don't suffer from it. But the feelings these people have are very real, and totally inescapable. Imagine the worst you've ever felt about yourself, but that feeling stretches on day after day, and nothing you do can change it. At first you try to work harder, but you don't feel any different. Then you try to change things in your life, but you feel the same. Eventually you simply come to accept that you will feel this way no matter what choices you make. That's when death becomes attractive. When you can't see a way out, when it looks like the awful feelings inside you will haunt you forever.
The good news, for anybody feeling that way, is that it will change. There are solutions. A person in that state has to trust that this is true.