The sun and the moon cannot shine at the same time. When the sun shines, it will cover up the moon's light, but the moon will not disappear.
The scary thing is not the time-travelers, the scary thing is the group of time-travelers who tried to change their destiny and succeeded...
The scary thing is not the reborn people, the scary thing is that the reborn people also want to change their destiny, and they succeed...
Intention: Sometimes it's better to behave yourself