I think one factor that could influence our attachment and our well-being are the circumstances we live in or if a person we feel securely attached to passes away or leaves. Some children may feel secure at home, but once they leave home they feel as if they cannot trust or relate to anyone else so they are distant even though they feel completely safe at home. Therefore, they grow up not relating as well to others because they only felt secure attachment to those at home. Also if someone passes away or leaves, we may have been securely attached before and related to others well before, but we detach ourselves from the world because we don't want to be as close to people anymore. This could be a factor in which our secure attachment style from a child may not match up with our expected well-being and attachment style as we are older.
