See, this chick seems like she could be a badass, who earned her battle scar in some forgotten war. So why is she acting like an airhead or a maid or something?

I feel like I'm missing something here. What makes this stuff so popular?

Here, I wrote a bio for that girl that would make me want to watch that show:

Name: Lara
Age: Unknown
Race: Unknown
Bio: Born amidst the war torn fields of Venezuela, Lara grew up with no support. From the ashes she arose, reaching a level of skill with a sniper rifle never before imagined. It was the only way she could survive. However, just as she was about to be adopted by a foster family and live a happy life in America, tragedy struck. The entire family disappeared off the face of the Earth. What happened to Lara's family, and what are the intentions of the mysterious organization who follows her every step?
Personality: jaded
Notable Features: Half of her face was blasted off when she and her brother were chased across a minefield by a gang of armed men as children. Only she survived, and the men's bodies were found impaled on trees as high as 50 feet in the air