She is perfectly capable of doing the job; she wants her trainer to do it all for her.
It can be terrifying to be hired for a job you’re not qualified for. A lot of people pad their resumes with skills that they haven’t actually mastered, and they panic when they’re tasked with using those skills flawlessly during the first week of their job. If you’re determined enough, you will stay up late and wake up early before your job starts to do a crash course on the skills you said you had, so your new boss won’t be able to tell that you lied. However, many people aren’t motivated to cover their tracks, and when they face a challenge at work, they hope someone else will do the job for them. After all, they’re the new guy! You can’t expect the new guy to master a job in one day… or can you?
There is always a learning curve when you start a new position, but if you can’t do fundamental stuff like using a computer or typing without looking at the keyboard, an employer might question their decision to hire you in the first place.