Most time travel theories ignore the fact that the earth is not fixed in space. It is moving relative to the sun in the solar system and the solar system is moving relative to the center of the galaxy, and the galaxy is… etc. A motion in each of these systems is not 100% accurately predictable forward or backward in time.
This fact alone means that any time traveler is most likely to arrive in the middle of empty space.
This fact alone means that any time traveler is most likely to arrive in the middle of empty space.