That's not the default Femshep, it's clearly been modded.
Yeah that's the mod from:
https://www.nexusmods.com/masseffect/mods/178
This is her real in game face.
Reducing the nasolabial folds, those lines running between her cheek and the mouth improves her appearance drastically of any female.
Nasolabial folds are the indentation lines on either side of the mouth that extend from the edge of the nose to the mouth's outer corners. They become more prominent when people smile. These
folds also tend to deepen with age
See the difference.
It only works if the character smiles, like this, then it becomes attractive, by default it makes the character look older with a default face.