The White Sox have a very right-hand-heavy lineup, especially coming into the season prior to the injuries. Robert, Jiménez, Abreu, Anderson, Vaughn, Madrigal, Grandal is dramatically better against lefties, Moncada is somewhat better against lefties, Mercedes was in the lineup for a while and was dramatically better against lefties, Engel can be a platoon player against lefties. In that case, adding some ability to hit right handed pitchers with a lefty bat has some potential to have very strong leverage, outweighing the loss of defense. That isn't the case for another righty.