In Sakura back story she was with ino at a ninja kunochi class
Few days Later she runs to ino and tell her she fallen in love .
She was attending ninja classes before she had a crush with sasuke -confirmed .
When Naruto was a kid he knew that he wanted to be recognized and become Hokage.
When Sasuke was a kid he knew that he had a plan to kill his brother for what he did to his clan.
When Sakura was a kid she just went to the academy.
When Kakashi asked team 7 about their goals:
Naruto still said that he wanted to become Hokage.
Sasuke still wanted revenge for his clan.
Sakura wanted to be with and close to Sasuke.
If you have any sense then you can see what this means.
Anyone can go the academy and try to be a ninja. It still doesn't take away that she never had any real goals of wanting to become a ninja on her own to better herself. If her lust for Sasuke was more important than passing the exams than she was never fit to be a ninja. Period.