At that time, she knew that the other sects were weaker than the Blood Skull sect. But she didn't know by how much weaker.
In her ignorance, she thought that it was a better idea to be the head of a chicken in the Purple Flower sect than to be the neck of another chicken or just one of the numerous tail feathers of that bird in the Blood Skull sect.
She has since learned that things weren't like that. She is indeed the head of the chicken that is the Purple Flower sect, but the chicken is crippled and weak.
It is unlikely that she would have reached the fifth mortal coil if she had joined the Blood Skull sect through the A grade admission. But if she did, she would surely be stronger as a nascent soul cultivator and also have a bright future ahead of her.
