Because an adaptor is an action that a person is not very aware of, for example pushing up your glasses, twirling your hair, etc. Starting to walk away from a person is more of a conscious decision that someone makes, and can't really be done without the person noticing.
In the 'Pandora's box', Haphaestus asks the goddesses to give Pandora a gift or a power. In other words he told them to give Pandora some of their powers.
