There may be cases where a child character has legitimate reason to want to flee a location, such as when their parents are attacked and the situation is desperate.
However, multiple child characters are deciding at age 5 or 6 that they ‘don’t like the culture’ and leaving with other adults. This seems absurd, partly because kids should generally not yet have the concept of being able to change their circumstances, and partly because there is a mechanical event that says something like ‘You trust your mother’ the moment they are spawned. Children should not go from trusting mom to moving across country with strangers in such a short time.
Part of playing a child character is accepting that you are going to be molded by what your mother/father/society tell you is true, and young children should not have the capacity to overrule that.