There you have your reason. This contest isn't about good voices at all, unfortunately.
Although I don't find her voice any special. I watched this (because some music video where the voice could have been altered a thousand times in the studio actually says nothing about the voice; see Rihanna, Katy Perry, etc.) and it's far too whiny for me.
Are you actually questioning the lyrics of a song in Eurovision? Currently the Spanish entry is, take me, shake me, take me, shake me, come on and shake me, take me, some Spanish crap, take me, shake me, bend me break me any way you want me...wait that's wrong.