She wants to save her life.
Might as well start all over again.
To be the Tinkerbell of your former self, you also need some "magic powers" to change the future.
Since she is at a loss to know that she is a time traveler, the "Traveler Alliance" or "Time Travel Master" is also worried that if she just herds sheep, she, an ignorant person who is responsible for the identity of "Terminator", will waste time due to fearlessness. Time travel also requires efficiency.
Since the "Great God of Time Travel" has given the "magic skill", if you want to get it, you have to pay for it. This truth is best understood by people who have traveled through time.