Agreed. There is a powerful tendency for historians, archeologists and anthropologists to isolate peoples by space, as well as time, and assume they never traveled farther than the horizon. That way its easier to make silly assumptions which justify ridiculous conclusions about what they did, and thought, and traveled, etc.
In fact, while travel has never been as easy as it is today, traders and warriors and others from many cultures have always traveled widely.
Probably the silliest assumption is that Jesus stayed in Nazareth and pounded nails from age 12 to 30. There is absolutely no evidence this is true, but many sweaty bible thumpers insist it is a fact. There is far more "evidence" that he traveled during that time than that he stayed at home.